1031201123100 has 72 divisors (see below), whose sum is σ = 2984263578240. Its totient is φ = 274926598080.

The previous prime is 1031201123087. The next prime is 1031201123101. The reversal of 1031201123100 is 13211021301.

It is a happy number.

It is a super-2 number, since 2×1031201123100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1031201123100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031201123101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 999891 + ... + 1749909.

Almost surely, 2^{1031201123100} is an apocalyptic number.

1031201123100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031201123100 is an abundant number, since it is smaller than the sum of its proper divisors (1953062455140).

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

1031201123100 is a wasteful number, since it uses less digits than its factorization.

1031201123100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754619 (or 754612 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1031201123100 its reverse (13211021301), we get a palindrome (1044412144401).

The spelling of 1031201123100 in words is "one trillion, thirty-one billion, two hundred one million, one hundred twenty-three thousand, one hundred".