1216971372254 has 16 divisors (see below), whose sum is σ = 1992224943216. Its totient is φ = 552941793600.

The previous prime is 1216971372251. The next prime is 1216971372257. The reversal of 1216971372254 is 4522731796121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1216971372251) and next prime (1216971372257).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216971372251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11295767 + ... + 11402994.

It is an arithmetic number, because the mean of its divisors is an integer number (124514058951).

Almost surely, 2^{1216971372254} is an apocalyptic number.

1216971372254 is a deficient number, since it is larger than the sum of its proper divisors (775253570962).

1216971372254 is a wasteful number, since it uses less digits than its factorization.

1216971372254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22701211.

The product of its digits is 1270080, while the sum is 50.

The spelling of 1216971372254 in words is "one trillion, two hundred sixteen billion, nine hundred seventy-one million, three hundred seventy-two thousand, two hundred fifty-four".