1210100021101 has 16 divisors (see below), whose sum is σ = 1244813875200. Its totient is φ = 1175638147200.

The previous prime is 1210100021093. The next prime is 1210100021107. The reversal of 1210100021101 is 1011200010121.

It is a cyclic number.

It is not a de Polignac number, because 1210100021101 - 2³ = 1210100021093 is a prime.

It is a super-2 number, since 2×1210100021101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210100021107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22962340 + ... + 23014978.

It is an arithmetic number, because the mean of its divisors is an integer number (77800867200).

Almost surely, 2^{1210100021101} is an apocalyptic number.

It is an amenable number.

1210100021101 is a deficient number, since it is larger than the sum of its proper divisors (34713854099).

1210100021101 is a wasteful number, since it uses less digits than its factorization.

1210100021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55020.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1210100021101 its reverse (1011200010121), we get a palindrome (2221300031222).

The spelling of 1210100021101 in words is "one trillion, two hundred ten billion, one hundred million, twenty-one thousand, one hundred one".