1220020010121 has 16 divisors (see below), whose sum is σ = 1789240471488. Its totient is φ = 739406064320.

The previous prime is 1220020010113. The next prime is 1220020010137. The reversal of 1220020010121 is 1210100200221.

It is not a de Polignac number, because 1220020010121 - 2³ = 1220020010113 is a prime.

It is a super-3 number, since 3×1220020010121³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220020010097 and 1220020010106.

It is not an unprimeable number, because it can be changed into a prime (1220020010191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152765856 + ... + 152773841.

It is an arithmetic number, because the mean of its divisors is an integer number (111827529468).

Almost surely, 2^{1220020010121} is an apocalyptic number.

1220020010121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220020010121 is a deficient number, since it is larger than the sum of its proper divisors (569220461367).

1220020010121 is an equidigital number, since it uses as much as digits as its factorization.

1220020010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305539733 (or 305539711 counting only the distinct ones).

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

Adding to 1220020010121 its reverse (1210100200221), we get a palindrome (2430120210342).

The spelling of 1220020010121 in words is "one trillion, two hundred twenty billion, twenty million, ten thousand, one hundred twenty-one".