20121211102 has 16 divisors (see below), whose sum is σ = 30512486592. Its totient is φ = 9950515200.

The previous prime is 20121211087. The next prime is 20121211139. The reversal of 20121211102 is 20111212102.

It is a super-2 number, since 2×20121211102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278203 + ... + 342985.

It is an arithmetic number, because the mean of its divisors is an integer number (1907030412).

Almost surely, 2^20121211102 is an apocalyptic number.

20121211102 is a deficient number, since it is larger than the sum of its proper divisors (10391275490).

20121211102 is a wasteful number, since it uses less digits than its factorization.

20121211102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66483.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20121211102 its reverse (20111212102), we get a palindrome (40232423204).

The spelling of 20121211102 in words is "twenty billion, one hundred twenty-one million, two hundred eleven thousand, one hundred two".