101015145021 has 32 divisors (see below), whose sum is σ = 160644261888. Its totient is φ = 55205029440.

The previous prime is 101015145013. The next prime is 101015145029. The reversal of 101015145021 is 120541510101.

It is an interprime number because it is at equal distance from previous prime (101015145013) and next prime (101015145029).

It is not a de Polignac number, because 101015145021 - 2³ = 101015145013 is a prime.

It is a super-2 number, since 2×101015145021² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101015145029) 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, 4728055 + ... + 4749371.

It is an arithmetic number, because the mean of its divisors is an integer number (5020133184).

Almost surely, 2^101015145021 is an apocalyptic number.

It is an amenable number.

101015145021 is a deficient number, since it is larger than the sum of its proper divisors (59629116867).

101015145021 is a wasteful number, since it uses less digits than its factorization.

101015145021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31161.

The product of its (nonzero) digits is 200, while the sum is 21.

Adding to 101015145021 its reverse (120541510101), we get a palindrome (221556655122).

The spelling of 101015145021 in words is "one hundred one billion, fifteen million, one hundred forty-five thousand, twenty-one".