1012201155631 has 8 divisors (see below), whose sum is σ = 1056309174144. Its totient is φ = 968101409880.

The previous prime is 1012201155619. The next prime is 1012201155643. The reversal of 1012201155631 is 1365511022101.

It is an interprime number because it is at equal distance from previous prime (1012201155619) and next prime (1012201155643).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012201155631 is a prime.

It is a super-2 number, since 2×1012201155631² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012201155631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012201155601) 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, 1817505 + ... + 2308186.

It is an arithmetic number, because the mean of its divisors is an integer number (132038646768).

Almost surely, 2^{1012201155631} is an apocalyptic number.

1012201155631 is a deficient number, since it is larger than the sum of its proper divisors (44108018513).

1012201155631 is a wasteful number, since it uses less digits than its factorization.

1012201155631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4136381.

The product of its (nonzero) digits is 1800, while the sum is 28.

Adding to 1012201155631 its reverse (1365511022101), we get a palindrome (2377712177732).

The spelling of 1012201155631 in words is "one trillion, twelve billion, two hundred one million, one hundred fifty-five thousand, six hundred thirty-one".