1231401220002 has 24 divisors (see below), whose sum is σ = 2668272297600. Its totient is φ = 410430716280.

The previous prime is 1231401219973. The next prime is 1231401220009. The reversal of 1231401220002 is 2000221041321.

It is a happy number.

1231401220002 is a `hidden beast` number, since 12 + 31 + 401 + 220 + 0 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1231401220009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2820502 + ... + 3227697.

It is an arithmetic number, because the mean of its divisors is an integer number (111178012400).

Almost surely, 2^{1231401220002} is an apocalyptic number.

1231401220002 is an abundant number, since it is smaller than the sum of its proper divisors (1436871077598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231401220002 is a wasteful number, since it uses less digits than its factorization.

1231401220002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6059518 (or 6059515 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1231401220002 its reverse (2000221041321), we get a palindrome (3231622261323).

The spelling of 1231401220002 in words is "one trillion, two hundred thirty-one billion, four hundred one million, two hundred twenty thousand, two".