1022020200121 has 4 divisors (see below), whose sum is σ = 1034333696592. Its totient is φ = 1009706703652.

The previous prime is 1022020200023. The next prime is 1022020200163. The reversal of 1022020200121 is 1210020202201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1022020200121 - 2²⁵ = 1021986645689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1022020209121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6156748111 + ... + 6156748276.

It is an arithmetic number, because the mean of its divisors is an integer number (258583424148).

Almost surely, 2^{1022020200121} is an apocalyptic number.

It is an amenable number.

1022020200121 is a deficient number, since it is larger than the sum of its proper divisors (12313496471).

1022020200121 is an equidigital number, since it uses as much as digits as its factorization.

1022020200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12313496470.

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

Adding to 1022020200121 its reverse (1210020202201), we get a palindrome (2232040402322).

The spelling of 1022020200121 in words is "one trillion, twenty-two billion, twenty million, two hundred thousand, one hundred twenty-one".