1021200033100 has 72 divisors (see below), whose sum is σ = 2404683621648. Its totient is φ = 374180102400.

The previous prime is 1021200033079. The next prime is 1021200033103. The reversal of 1021200033100 is 13300021201.

1021200033100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1021200033100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (1021200033103) 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, 2827939 + ... + 3168538.

It is an arithmetic number, because the mean of its divisors is an integer number (33398383634).

Almost surely, 2^{1021200033100} is an apocalyptic number.

1021200033100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021200033100 is an abundant number, since it is smaller than the sum of its proper divisors (1383483588548).

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

1021200033100 is a wasteful number, since it uses less digits than its factorization.

1021200033100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5996635 (or 5996628 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 1021200033100 its reverse (13300021201), we get a palindrome (1034500054301).

The spelling of 1021200033100 in words is "one trillion, twenty-one billion, two hundred million, thirty-three thousand, one hundred".