1231111202422 has 16 divisors (see below), whose sum is σ = 1877389704432. Its totient is φ = 605345621760.

The previous prime is 1231111202407. The next prime is 1231111202423. The reversal of 1231111202422 is 2242021111321.

It is a junction number, because it is equal to n+sod(n) for n = 1231111202393 and 1231111202402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231111202423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7667079 + ... + 7826002.

It is an arithmetic number, because the mean of its divisors is an integer number (117336856527).

Almost surely, 2^{1231111202422} is an apocalyptic number.

1231111202422 is a deficient number, since it is larger than the sum of its proper divisors (646278502010).

1231111202422 is a wasteful number, since it uses less digits than its factorization.

1231111202422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15493743.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 1231111202422 its reverse (2242021111321), we get a palindrome (3473132313743).

The spelling of 1231111202422 in words is "one trillion, two hundred thirty-one billion, one hundred eleven million, two hundred two thousand, four hundred twenty-two".