123211101210 has 64 divisors (see below), whose sum is σ = 304037604864. Its totient is φ = 31936550400.

The previous prime is 123211101203. The next prime is 123211101241. The reversal of 123211101210 is 12101112321.

It is a super-2 number, since 2×123211101210² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 123211101210.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148512 + ... + 518148.

It is an arithmetic number, because the mean of its divisors is an integer number (4750587576).

Almost surely, 2^123211101210 is an apocalyptic number.

123211101210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 123211101210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152018802432).

123211101210 is an abundant number, since it is smaller than the sum of its proper divisors (180826503654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123211101210 is a wasteful number, since it uses less digits than its factorization.

123211101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369959.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 123211101210 its reverse (12101112321), we get a palindrome (135312213531).

The spelling of 123211101210 in words is "one hundred twenty-three billion, two hundred eleven million, one hundred one thousand, two hundred ten".