1021020110100 has 108 divisors (see below), whose sum is σ = 3339475697376. Its totient is φ = 260434109760.

The previous prime is 1021020110093. The next prime is 1021020110111. The reversal of 1021020110100 is 10110201201.

It is a happy number.

It is a super-2 number, since 2×1021020110100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 24641622 + ... + 24683021.

It is an arithmetic number, because the mean of its divisors is an integer number (30921071272).

Almost surely, 2^{1021020110100} is an apocalyptic number.

1021020110100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021020110100 is an abundant number, since it is smaller than the sum of its proper divisors (2318455587276).

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

1021020110100 is a wasteful number, since it uses less digits than its factorization.

1021020110100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49324686 (or 49324676 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1021020110100 its reverse (10110201201), we get a palindrome (1031130311301).

The spelling of 1021020110100 in words is "one trillion, twenty-one billion, twenty million, one hundred ten thousand, one hundred".