2121642631354 has 16 divisors (see below), whose sum is σ = 3391487947008. Its totient is φ = 993109315792.

The previous prime is 2121642631351. The next prime is 2121642631447. The reversal of 2121642631354 is 4531362461212.

It is not an unprimeable number, because it can be changed into a prime (2121642631351) 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, 490664497 + ... + 490668820.

It is an arithmetic number, because the mean of its divisors is an integer number (211967996688).

Almost surely, 2^{2121642631354} is an apocalyptic number.

2121642631354 is a deficient number, since it is larger than the sum of its proper divisors (1269845315654).

2121642631354 is a wasteful number, since it uses less digits than its factorization.

2121642631354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981333389.

The product of its digits is 207360, while the sum is 40.

The spelling of 2121642631354 in words is "two trillion, one hundred twenty-one billion, six hundred forty-two million, six hundred thirty-one thousand, three hundred fifty-four".