100000001121021 has 8 divisors (see below), whose sum is σ = 148148149808960. Its totient is φ = 66666667413996.

The previous prime is 100000001121019. The next prime is 100000001121047. The reversal of 100000001121021 is 120121100000001.

It is a happy number.

It is not a de Polignac number, because 100000001121021 - 2¹ = 100000001121019 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100000001120994 and 100000001121012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100000001121001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1851851872585 + ... + 1851851872638.

It is an arithmetic number, because the mean of its divisors is an integer number (18518518726120).

Almost surely, 2^{100000001121021} is an apocalyptic number.

It is an amenable number.

100000001121021 is a deficient number, since it is larger than the sum of its proper divisors (48148148687939).

100000001121021 is an equidigital number, since it uses as much as digits as its factorization.

100000001121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703703745232 (or 3703703745226 counting only the distinct ones).

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

Adding to 100000001121021 its reverse (120121100000001), we get a palindrome (220121101121022).

The spelling of 100000001121021 in words is "one hundred trillion, one million, one hundred twenty-one thousand, twenty-one".