21121022131013 has 8 divisors (see below), whose sum is σ = 24138367422528. Its totient is φ = 18103690943424.

The previous prime is 21121022131009. The next prime is 21121022131103. The reversal of 21121022131013 is 31013122012112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21121022131013 - 2² = 21121022131009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121022136013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94331 + ... + 6500072.

It is an arithmetic number, because the mean of its divisors is an integer number (3017295927816).

Almost surely, 2^{21121022131013} is an apocalyptic number.

It is an amenable number.

21121022131013 is a deficient number, since it is larger than the sum of its proper divisors (3017345291515).

21121022131013 is an equidigital number, since it uses as much as digits as its factorization.

21121022131013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7051963.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21121022131013 its reverse (31013122012112), we get a palindrome (52134144143125).

The spelling of 21121022131013 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-two million, one hundred thirty-one thousand, thirteen".