1021000012021 has 4 divisors (see below), whose sum is σ = 1113818194944. Its totient is φ = 928181829100.

The previous prime is 1021000012001. The next prime is 1021000012027. The reversal of 1021000012021 is 1202100001201.

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 1021000012021 - 2³³ = 1012410077429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021000011989 and 1021000012007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021000012027) 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, 46409091445 + ... + 46409091466.

It is an arithmetic number, because the mean of its divisors is an integer number (278454548736).

Almost surely, 2^{1021000012021} is an apocalyptic number.

1021000012021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021000012021 is a deficient number, since it is larger than the sum of its proper divisors (92818182923).

1021000012021 is an equidigital number, since it uses as much as digits as its factorization.

1021000012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92818182922.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1021000012021 its reverse (1202100001201), we get a palindrome (2223100013222).

The spelling of 1021000012021 in words is "one trillion, twenty-one billion, twelve thousand, twenty-one".