1021021010021 has 16 divisors (see below), whose sum is σ = 1158573383424. Its totient is φ = 894337323264.

The previous prime is 1021021010017. The next prime is 1021021010059. The reversal of 1021021010021 is 1200101201201.

It is a cyclic number.

It is not a de Polignac number, because 1021021010021 - 2² = 1021021010017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021021009984 and 1021021010011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021021010071) 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, 35273465 + ... + 35302398.

It is an arithmetic number, because the mean of its divisors is an integer number (72410836464).

Almost surely, 2^{1021021010021} is an apocalyptic number.

It is an amenable number.

1021021010021 is a deficient number, since it is larger than the sum of its proper divisors (137552373403).

1021021010021 is a wasteful number, since it uses less digits than its factorization.

1021021010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70575940.

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

Adding to 1021021010021 its reverse (1200101201201), we get a palindrome (2221122211222).

The spelling of 1021021010021 in words is "one trillion, twenty-one billion, twenty-one million, ten thousand, twenty-one".