10402021211021 has 16 divisors (see below), whose sum is σ = 11401057264128. Its totient is φ = 9411903475200.

The previous prime is 10402021211017. The next prime is 10402021211051. The reversal of 10402021211021 is 12011212020401.

It is a cyclic number.

It is not a de Polignac number, because 10402021211021 - 2² = 10402021211017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10402021211051) 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, 10723265 + ... + 11653001.

It is an arithmetic number, because the mean of its divisors is an integer number (712566079008).

Almost surely, 2^{10402021211021} is an apocalyptic number.

10402021211021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10402021211021 is a deficient number, since it is larger than the sum of its proper divisors (999036053107).

10402021211021 is a wasteful number, since it uses less digits than its factorization.

10402021211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934532.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 10402021211021 its reverse (12011212020401), we get a palindrome (22413233231422).

The spelling of 10402021211021 in words is "ten trillion, four hundred two billion, twenty-one million, two hundred eleven thousand, twenty-one".