1021000212021 has 16 divisors (see below), whose sum is σ = 1375887902400. Its totient is φ = 673428271488.

The previous prime is 1021000211993. The next prime is 1021000212061. The reversal of 1021000212021 is 1202120001201.

It is not a de Polignac number, because 1021000212021 - 2⁵ = 1021000211989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021000211988 and 1021000212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021000212061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4719856 + ... + 4931433.

It is an arithmetic number, because the mean of its divisors is an integer number (85992993900).

Almost surely, 2^{1021000212021} is an apocalyptic number.

It is an amenable number.

1021000212021 is a deficient number, since it is larger than the sum of its proper divisors (354887690379).

1021000212021 is a wasteful number, since it uses less digits than its factorization.

1021000212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9651668.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1021000212021 its reverse (1202120001201), we get a palindrome (2223120213222).

The spelling of 1021000212021 in words is "one trillion, twenty-one billion, two hundred twelve thousand, twenty-one".