213131030012121 has 16 divisors (see below), whose sum is σ = 306035958057536. Its totient is φ = 131156846122176.

The previous prime is 213131030012107. The next prime is 213131030012129. The reversal of 213131030012121 is 121210030131312.

It is not a de Polignac number, because 213131030012121 - 2²² = 213131025817817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213131030012129) 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, 7474030 + ... + 21957303.

It is an arithmetic number, because the mean of its divisors is an integer number (19127247378596).

Almost surely, 2^{213131030012121} is an apocalyptic number.

It is an amenable number.

213131030012121 is a deficient number, since it is larger than the sum of its proper divisors (92904928045415).

213131030012121 is a wasteful number, since it uses less digits than its factorization.

213131030012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29617032.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 213131030012121 its reverse (121210030131312), we get a palindrome (334341060143433).

The spelling of 213131030012121 in words is "two hundred thirteen trillion, one hundred thirty-one billion, thirty million, twelve thousand, one hundred twenty-one".