21216235352030 has 16 divisors (see below), whose sum is σ = 38214167634864. Its totient is φ = 8480951029440.

The previous prime is 21216235352021. The next prime is 21216235352077. The reversal of 21216235352030 is 3025353261212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 692872847 + ... + 692903466.

It is an arithmetic number, because the mean of its divisors is an integer number (2388385477179).

Almost surely, 2^{21216235352030} is an apocalyptic number.

21216235352030 is a deficient number, since it is larger than the sum of its proper divisors (16997932282834).

21216235352030 is a wasteful number, since it uses less digits than its factorization.

21216235352030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385777851.

The product of its (nonzero) digits is 64800, while the sum is 35.

The spelling of 21216235352030 in words is "twenty-one trillion, two hundred sixteen billion, two hundred thirty-five million, three hundred fifty-two thousand, thirty".