121210221320131 has 16 divisors (see below), whose sum is σ = 125071567810560. Its totient is φ = 117407451863520.

The previous prime is 121210221320081. The next prime is 121210221320207. The reversal of 121210221320131 is 131023122012121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121210221320131 - 2¹⁷ = 121210221189059 is a prime.

It is a super-2 number, since 2×121210221320131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121210221320831) 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, 46079466 + ... + 48638848.

It is an arithmetic number, because the mean of its divisors is an integer number (7816972988160).

Almost surely, 2^{121210221320131} is an apocalyptic number.

121210221320131 is a deficient number, since it is larger than the sum of its proper divisors (3861346490429).

121210221320131 is a wasteful number, since it uses less digits than its factorization.

121210221320131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570826.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 121210221320131 its reverse (131023122012121), we get a palindrome (252233343332252).

The spelling of 121210221320131 in words is "one hundred twenty-one trillion, two hundred ten billion, two hundred twenty-one million, three hundred twenty thousand, one hundred thirty-one".