100102021220020 has 24 divisors (see below), whose sum is σ = 210215346400584. Its totient is φ = 40040598614016.

The previous prime is 100102021219957. The next prime is 100102021220059. The reversal of 100102021220020 is 20022120201001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14050832421136 + 86051188798884 = 3748444^2 + 9276378^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9177169 + ... + 16864888.

It is an arithmetic number, because the mean of its divisors is an integer number (8758972766691).

Almost surely, 2^{100102021220020} is an apocalyptic number.

100102021220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100102021220020 is an abundant number, since it is smaller than the sum of its proper divisors (110113325180564).

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

100102021220020 is a wasteful number, since it uses less digits than its factorization.

100102021220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26234259 (or 26234257 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 100102021220020 its reverse (20022120201001), we get a palindrome (120124141421021).

The spelling of 100102021220020 in words is "one hundred trillion, one hundred two billion, twenty-one million, two hundred twenty thousand, twenty".