1220420420131 has 16 divisors (see below), whose sum is σ = 1408284172800. Its totient is φ = 1046697664320.

The previous prime is 1220420420077. The next prime is 1220420420147. The reversal of 1220420420131 is 1310240240221.

It is not a de Polignac number, because 1220420420131 - 2³⁵ = 1186060681763 is a prime.

It is a super-2 number, since 2×1220420420131² (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 (1220420420231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33021231 + ... + 33058168.

It is an arithmetic number, because the mean of its divisors is an integer number (88017760800).

Almost surely, 2^{1220420420131} is an apocalyptic number.

1220420420131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220420420131 is a deficient number, since it is larger than the sum of its proper divisors (187863752669).

1220420420131 is a wasteful number, since it uses less digits than its factorization.

1220420420131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66079506.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 1220420420131 its reverse (1310240240221), we get a palindrome (2530660660352).

The spelling of 1220420420131 in words is "one trillion, two hundred twenty billion, four hundred twenty million, four hundred twenty thousand, one hundred thirty-one".