101010012021 has 24 divisors (see below), whose sum is σ = 158078606400. Its totient is φ = 61904900736.

The previous prime is 101010012017. The next prime is 101010012049. The reversal of 101010012021 is 120210010101.

It is a happy number.

It is not a de Polignac number, because 101010012021 - 2² = 101010012017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101010011994 and 101010012012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101010012011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7670121 + ... + 7683278.

It is an arithmetic number, because the mean of its divisors is an integer number (6586608600).

Almost surely, 2^101010012021 is an apocalyptic number.

It is an amenable number.

101010012021 is a deficient number, since it is larger than the sum of its proper divisors (57068594379).

101010012021 is a wasteful number, since it uses less digits than its factorization.

101010012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15353465 (or 15353462 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 101010012021 its reverse (120210010101), we get a palindrome (221220022122).

It can be divided in two parts, 1010100 and 12021, that added together give a square (1022121 = 1011²).

The spelling of 101010012021 in words is "one hundred one billion, ten million, twelve thousand, twenty-one".