2122440641551 has 4 divisors (see below), whose sum is σ = 2247290091072. Its totient is φ = 1997591192032.

The previous prime is 2122440641509. The next prime is 2122440641567. The reversal of 2122440641551 is 1551460442212.

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 2122440641551 - 2⁹ = 2122440641039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2122440641551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122440041551) 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, 62424724735 + ... + 62424724768.

It is an arithmetic number, because the mean of its divisors is an integer number (561822522768).

Almost surely, 2^{2122440641551} is an apocalyptic number.

2122440641551 is a deficient number, since it is larger than the sum of its proper divisors (124849449521).

2122440641551 is a wasteful number, since it uses less digits than its factorization.

2122440641551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124849449520.

The product of its (nonzero) digits is 76800, while the sum is 37.

The spelling of 2122440641551 in words is "two trillion, one hundred twenty-two billion, four hundred forty million, six hundred forty-one thousand, five hundred fifty-one".