1222168012251 has 4 divisors (see below), whose sum is σ = 1629557349672. Its totient is φ = 814778674832.

The previous prime is 1222168012243. The next prime is 1222168012267. The reversal of 1222168012251 is 1522108612221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1222168012251 - 2³ = 1222168012243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222168012201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203694668706 + ... + 203694668711.

It is an arithmetic number, because the mean of its divisors is an integer number (407389337418).

Almost surely, 2^{1222168012251} is an apocalyptic number.

1222168012251 is a deficient number, since it is larger than the sum of its proper divisors (407389337421).

1222168012251 is an equidigital number, since it uses as much as digits as its factorization.

1222168012251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407389337420.

The product of its (nonzero) digits is 7680, while the sum is 33.

It can be divided in two parts, 12221680 and 12251, that added together give a triangular number (12233931 = T₄₉₄₆).

The spelling of 1222168012251 in words is "one trillion, two hundred twenty-two billion, one hundred sixty-eight million, twelve thousand, two hundred fifty-one".