1220127931 has 4 divisors (see below), whose sum is σ = 1331048664. Its totient is φ = 1109207200.

The previous prime is 1220127911. The next prime is 1220127941. The reversal of 1220127931 is 1397210221.

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 1220127931 - 2¹³ = 1220119739 is a prime.

It is a super-2 number, since 2×1220127931² = 2977424336012681522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1220127931.

It is not an unprimeable number, because it can be changed into a prime (1220127911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55460350 + ... + 55460371.

It is an arithmetic number, because the mean of its divisors is an integer number (332762166).

Almost surely, 2^1220127931 is an apocalyptic number.

1220127931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220127931 is a deficient number, since it is larger than the sum of its proper divisors (110920733).

1220127931 is a wasteful number, since it uses less digits than its factorization.

1220127931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110920732.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1220127931 is about 34930.3296720772. The cubic root of 1220127931 is about 1068.5670780448.

The spelling of 1220127931 in words is "one billion, two hundred twenty million, one hundred twenty-seven thousand, nine hundred thirty-one".