151216620221 has 16 divisors (see below), whose sum is σ = 157183623168. Its totient is φ = 145318374000.

The previous prime is 151216620211. The next prime is 151216620251. The reversal of 151216620221 is 122026612151.

151216620221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 151216620221 - 2¹⁸ = 151216358077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151216620211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26037500 + ... + 26043306.

It is an arithmetic number, because the mean of its divisors is an integer number (9823976448).

Almost surely, 2^151216620221 is an apocalyptic number.

It is an amenable number.

151216620221 is a deficient number, since it is larger than the sum of its proper divisors (5967002947).

151216620221 is a wasteful number, since it uses less digits than its factorization.

151216620221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11552.

The product of its (nonzero) digits is 2880, while the sum is 29.

The spelling of 151216620221 in words is "one hundred fifty-one billion, two hundred sixteen million, six hundred twenty thousand, two hundred twenty-one".