101123001021 has 32 divisors (see below), whose sum is σ = 159215616000. Its totient is φ = 55866867840.

The previous prime is 101123001017. The next prime is 101123001043. The reversal of 101123001021 is 120100321101.

It is not a de Polignac number, because 101123001021 - 2² = 101123001017 is a prime.

It is a super-2 number, since 2×101123001021² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101123000988 and 101123001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101123001121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 608860 + ... + 756938.

It is an arithmetic number, because the mean of its divisors is an integer number (4975488000).

Almost surely, 2^101123001021 is an apocalyptic number.

It is an amenable number.

101123001021 is a deficient number, since it is larger than the sum of its proper divisors (58092614979).

101123001021 is a wasteful number, since it uses less digits than its factorization.

101123001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149169.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 101123001021 its reverse (120100321101), we get a palindrome (221223322122).

The spelling of 101123001021 in words is "one hundred one billion, one hundred twenty-three million, one thousand, twenty-one".