21121110022352 has 20 divisors (see below), whose sum is σ = 40936544759520. Its totient is φ = 10556840407008.

The previous prime is 21121110022351. The next prime is 21121110022357. The reversal of 21121110022352 is 25322001112112.

It is a super-2 number, since 2×21121110022352² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121110022351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232115852 + ... + 232206827.

It is an arithmetic number, because the mean of its divisors is an integer number (2046827237976).

Almost surely, 2^{21121110022352} is an apocalyptic number.

It is an amenable number.

21121110022352 is a deficient number, since it is larger than the sum of its proper divisors (19815434737168).

21121110022352 is a wasteful number, since it uses less digits than its factorization.

21121110022352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464325530 (or 464325524 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 21121110022352 its reverse (25322001112112), we get a palindrome (46443111134464).

The spelling of 21121110022352 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred ten million, twenty-two thousand, three hundred fifty-two".