21216020143132 has 12 divisors (see below), whose sum is σ = 37757323983960. Its totient is φ = 10428213290576.

The previous prime is 21216020143121. The next prime is 21216020143133. The reversal of 21216020143132 is 23134102061212.

It is a self number, because there is not a number n which added to its sum of digits gives 21216020143132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21216020143133) 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, 44949194983 + ... + 44949195454.

It is an arithmetic number, because the mean of its divisors is an integer number (3146443665330).

Almost surely, 2^{21216020143132} is an apocalyptic number.

It is an amenable number.

21216020143132 is a deficient number, since it is larger than the sum of its proper divisors (16541303840828).

21216020143132 is a wasteful number, since it uses less digits than its factorization.

21216020143132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89898390500 (or 89898390498 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 21216020143132 in words is "twenty-one trillion, two hundred sixteen billion, twenty million, one hundred forty-three thousand, one hundred thirty-two".