21121034430313 has 8 divisors (see below), whose sum is σ = 21287559186432. Its totient is φ = 20954513071296.

The previous prime is 21121034430277. The next prime is 21121034430329. The reversal of 21121034430313 is 31303443012112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21121034430313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21121034430373) 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, 12452481 + ... + 14046577.

It is an arithmetic number, because the mean of its divisors is an integer number (2660944898304).

Almost surely, 2^{21121034430313} is an apocalyptic number.

It is an amenable number.

21121034430313 is a deficient number, since it is larger than the sum of its proper divisors (166524756119).

21121034430313 is a wasteful number, since it uses less digits than its factorization.

21121034430313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698551.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 21121034430313 its reverse (31303443012112), we get a palindrome (52424477442425).

The spelling of 21121034430313 in words is "twenty-one trillion, one hundred twenty-one billion, thirty-four million, four hundred thirty thousand, three hundred thirteen".