101021012021 has 4 divisors (see below), whose sum is σ = 101181109344. Its totient is φ = 100860914700.

The previous prime is 101021012009. The next prime is 101021012063. The reversal of 101021012021 is 120210120101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101021012021 - 2³⁴ = 83841142837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101021011993 and 101021012011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101021012221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80047715 + ... + 80048976.

It is an arithmetic number, because the mean of its divisors is an integer number (25295277336).

Almost surely, 2^101021012021 is an apocalyptic number.

It is an amenable number.

101021012021 is a deficient number, since it is larger than the sum of its proper divisors (160097323).

101021012021 is an equidigital number, since it uses as much as digits as its factorization.

101021012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160097322.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101021012021 its reverse (120210120101), we get a palindrome (221231132122).

The spelling of 101021012021 in words is "one hundred one billion, twenty-one million, twelve thousand, twenty-one".