222021637326121 has 2 divisors, whose sum is σ = 222021637326122. Its totient is φ = 222021637326120.

The previous prime is 222021637326113. The next prime is 222021637326187. The reversal of 222021637326121 is 121623736120222.

222021637326121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191352193326121 + 30669444000000 = 13833011^2 + 5538000^2 .

It is a cyclic number.

It is not a de Polignac number, because 222021637326121 - 2³ = 222021637326113 is a prime.

It is not a weakly prime, because it can be changed into another prime (222021637323121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111010818663060 + 111010818663061.

It is an arithmetic number, because the mean of its divisors is an integer number (111010818663061).

Almost surely, 2^{222021637326121} is an apocalyptic number.

It is an amenable number.

222021637326121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222021637326121 is an equidigital number, since it uses as much as digits as its factorization.

222021637326121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 222021637326121 in words is "two hundred twenty-two trillion, twenty-one billion, six hundred thirty-seven million, three hundred twenty-six thousand, one hundred twenty-one".