21151053322 has 32 divisors (see below), whose sum is σ = 38089440000. Its totient is φ = 8612406528.

The previous prime is 21151053247. The next prime is 21151053337. The reversal of 21151053322 is 22335015112.

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, 172447 + ... + 268402.

It is an arithmetic number, because the mean of its divisors is an integer number (1190295000).

Almost surely, 2^21151053322 is an apocalyptic number.

21151053322 is a deficient number, since it is larger than the sum of its proper divisors (16938386678).

21151053322 is a wasteful number, since it uses less digits than its factorization.

21151053322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441030.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 21151053322 its reverse (22335015112), we get a palindrome (43486068434).

The spelling of 21151053322 in words is "twenty-one billion, one hundred fifty-one million, fifty-three thousand, three hundred twenty-two".