1220859752131 has 4 divisors (see below), whose sum is σ = 1225173744472. Its totient is φ = 1216545759792.

The previous prime is 1220859752093. The next prime is 1220859752149. The reversal of 1220859752131 is 1312579580221.

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 1220859752131 - 2³⁹ = 671103938243 is a prime.

It is a super-2 number, since 2×1220859752131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220859752191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2156995746 + ... + 2156996311.

It is an arithmetic number, because the mean of its divisors is an integer number (306293436118).

Almost surely, 2^{1220859752131} is an apocalyptic number.

1220859752131 is a deficient number, since it is larger than the sum of its proper divisors (4313992341).

1220859752131 is an equidigital number, since it uses as much as digits as its factorization.

1220859752131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4313992340.

The product of its (nonzero) digits is 302400, while the sum is 46.

The spelling of 1220859752131 in words is "one trillion, two hundred twenty billion, eight hundred fifty-nine million, seven hundred fifty-two thousand, one hundred thirty-one".