101220002121 has 32 divisors (see below), whose sum is σ = 161641542400. Its totient is φ = 56276736768.

The previous prime is 101220002113. The next prime is 101220002171. The reversal of 101220002121 is 121200022101.

It is not a de Polignac number, because 101220002121 - 2³ = 101220002113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101220002097 and 101220002106.

It is not an unprimeable number, because it can be changed into a prime (101220002171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1291216 + ... + 1367361.

It is an arithmetic number, because the mean of its divisors is an integer number (5051298200).

Almost surely, 2^101220002121 is an apocalyptic number.

It is an amenable number.

101220002121 is a deficient number, since it is larger than the sum of its proper divisors (60421540279).

101220002121 is an equidigital number, since it uses as much as digits as its factorization.

101220002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2658638 (or 2658624 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 101220002121 its reverse (121200022101), we get a palindrome (222420024222).

The spelling of 101220002121 in words is "one hundred one billion, two hundred twenty million, two thousand, one hundred twenty-one".