1220042100431 has 32 divisors (see below), whose sum is σ = 1546905086976. Its totient is φ = 934566336000.

The previous prime is 1220042100427. The next prime is 1220042100467. The reversal of 1220042100431 is 1340012400221.

It is not a de Polignac number, because 1220042100431 - 2² = 1220042100427 is a prime.

It is a super-2 number, since 2×1220042100431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220042100131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8301911 + ... + 8447591.

It is an arithmetic number, because the mean of its divisors is an integer number (48340783968).

Almost surely, 2^{1220042100431} is an apocalyptic number.

1220042100431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220042100431 is a deficient number, since it is larger than the sum of its proper divisors (326862986545).

1220042100431 is a wasteful number, since it uses less digits than its factorization.

1220042100431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147543.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1220042100431 its reverse (1340012400221), we get a palindrome (2560054500652).

The spelling of 1220042100431 in words is "one trillion, two hundred twenty billion, forty-two million, one hundred thousand, four hundred thirty-one".