21121031002313 has 16 divisors (see below), whose sum is σ = 23160860331840. Its totient is φ = 19101351936000.

The previous prime is 21121031002277. The next prime is 21121031002399. The reversal of 21121031002313 is 31320013012112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21121031002313 - 2⁶ = 21121031002249 is a prime.

It is a super-2 number, since 2×21121031002313² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21121031022313) 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, 2683763 + ... + 7031688.

It is an arithmetic number, because the mean of its divisors is an integer number (1447553770740).

Almost surely, 2^{21121031002313} is an apocalyptic number.

It is an amenable number.

21121031002313 is a deficient number, since it is larger than the sum of its proper divisors (2039829329527).

21121031002313 is a wasteful number, since it uses less digits than its factorization.

21121031002313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9716488.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21121031002313 its reverse (31320013012112), we get a palindrome (52441044014425).

The spelling of 21121031002313 in words is "twenty-one trillion, one hundred twenty-one billion, thirty-one million, two thousand, three hundred thirteen".