21211577274 has 32 divisors (see below), whose sum is σ = 42566647104. Its totient is φ = 7046645760.

The previous prime is 21211577209. The next prime is 21211577287. The reversal of 21211577274 is 47277511212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2908837 + ... + 2916119.

It is an arithmetic number, because the mean of its divisors is an integer number (1330207722).

Almost surely, 2^21211577274 is an apocalyptic number.

21211577274 is an abundant number, since it is smaller than the sum of its proper divisors (21355069830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21211577274 is a wasteful number, since it uses less digits than its factorization.

21211577274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8862.

The product of its digits is 54880, while the sum is 39.

The spelling of 21211577274 in words is "twenty-one billion, two hundred eleven million, five hundred seventy-seven thousand, two hundred seventy-four".