1011202000021 has 4 divisors (see below), whose sum is σ = 1020479082700. Its totient is φ = 1001924917344.

The previous prime is 1011201999989. The next prime is 1011202000033. The reversal of 1011202000021 is 1200002021101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 281520442225 + 729681557796 = 530585^2 + 854214^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011202000021 - 2⁵ = 1011201999989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011201999971 and 1011202000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011202000121) 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, 4638541176 + ... + 4638541393.

It is an arithmetic number, because the mean of its divisors is an integer number (255119770675).

Almost surely, 2^{1011202000021} is an apocalyptic number.

It is an amenable number.

1011202000021 is a deficient number, since it is larger than the sum of its proper divisors (9277082679).

1011202000021 is an equidigital number, since it uses as much as digits as its factorization.

1011202000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9277082678.

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

Adding to 1011202000021 its reverse (1200002021101), we get a palindrome (2211204021122).

The spelling of 1011202000021 in words is "one trillion, eleven billion, two hundred two million, twenty-one", and thus it is an aban number.