214861262720021 has 32 divisors (see below), whose sum is σ = 221220160581600. Its totient is φ = 208594245443584.

The previous prime is 214861262719949. The next prime is 214861262720063. The reversal of 214861262720021 is 120027262168412.

It can be written as a sum of positive squares in 16 ways, for example, as 131146265551921 + 83714997168100 = 11451911^2 + 9149590^2 .

It is a cyclic number.

It is not a de Polignac number, because 214861262720021 - 2²⁶ = 214861195611157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214861262729021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9123996155 + ... + 9124019703.

It is an arithmetic number, because the mean of its divisors is an integer number (6913130018175).

Almost surely, 2^{214861262720021} is an apocalyptic number.

It is an amenable number.

214861262720021 is a deficient number, since it is larger than the sum of its proper divisors (6358897861579).

214861262720021 is a wasteful number, since it uses less digits than its factorization.

214861262720021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26185.

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 214861262720021 in words is "two hundred fourteen trillion, eight hundred sixty-one billion, two hundred sixty-two million, seven hundred twenty thousand, twenty-one".