21216236250152 has 16 divisors (see below), whose sum is σ = 40227414239700. Its totient is φ = 10488925786240.

The previous prime is 21216236250133. The next prime is 21216236250199. The reversal of 21216236250152 is 25105263261212.

It can be written as a sum of positive squares in 2 ways, for example, as 15564176961316 + 5652059288836 = 3945146^2 + 2377406^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14899041599 + ... + 14899043022.

Almost surely, 2^{21216236250152} is an apocalyptic number.

It is an amenable number.

21216236250152 is a deficient number, since it is larger than the sum of its proper divisors (19011177989548).

21216236250152 is a wasteful number, since it uses less digits than its factorization.

21216236250152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29798084716 (or 29798084712 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 21216236250152 in words is "twenty-one trillion, two hundred sixteen billion, two hundred thirty-six million, two hundred fifty thousand, one hundred fifty-two".