100020121000 has 32 divisors (see below), whose sum is σ = 234047085480. Its totient is φ = 40008048000.

The previous prime is 100020120979. The next prime is 100020121021. The reversal of 100020121000 is 121020001.

It is an interprime number because it is at equal distance from previous prime (100020120979) and next prime (100020121021).

It can be written as a sum of positive squares in 4 ways, for example, as 3904000324 + 96116120676 = 62482^2 + 310026^2 .

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, 50009061 + ... + 50011060.

Almost surely, 2^100020121000 is an apocalyptic number.

100020121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100020121000 is an abundant number, since it is smaller than the sum of its proper divisors (134026964480).

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

100020121000 is a wasteful number, since it uses less digits than its factorization.

100020121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100020142 (or 100020128 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 100020121000 its reverse (121020001), we get a palindrome (100141141001).

It can be divided in two parts, 1000201 and 21000, that added together give a palindrome (1021201).

The spelling of 100020121000 in words is "one hundred billion, twenty million, one hundred twenty-one thousand".