201431022102 has 20 divisors (see below), whose sum is σ = 451354698036. Its totient is φ = 67143673980.

The previous prime is 201431022097. The next prime is 201431022109. The reversal of 201431022102 is 201220134102.

It is a happy number.

201431022102 is a `hidden beast` number, since 20 + 1 + 431 + 0 + 2 + 210 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201431022109) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 621700524 + ... + 621700847.

Almost surely, 2^201431022102 is an apocalyptic number.

201431022102 is an abundant number, since it is smaller than the sum of its proper divisors (249923675934).

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

201431022102 is a wasteful number, since it uses less digits than its factorization.

201431022102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243401385 (or 1243401376 counting only the distinct ones).

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

Adding to 201431022102 its reverse (201220134102), we get a palindrome (402651156204).

The spelling of 201431022102 in words is "two hundred one billion, four hundred thirty-one million, twenty-two thousand, one hundred two".