2021010220121 has 4 divisors (see below), whose sum is σ = 2029913349072. Its totient is φ = 2012107091172.

The previous prime is 2021010220051. The next prime is 2021010220127. The reversal of 2021010220121 is 1210220101202.

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 a de Polignac number, because none of the positive numbers 2^k-2021010220121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021010220096 and 2021010220105.

It is not an unprimeable number, because it can be changed into a prime (2021010220127) 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, 4451564135 + ... + 4451564588.

It is an arithmetic number, because the mean of its divisors is an integer number (507478337268).

Almost surely, 2^{2021010220121} is an apocalyptic number.

It is an amenable number.

2021010220121 is a deficient number, since it is larger than the sum of its proper divisors (8903128951).

2021010220121 is an equidigital number, since it uses as much as digits as its factorization.

2021010220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8903128950.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2021010220121 its reverse (1210220101202), we get a palindrome (3231230321323).

The spelling of 2021010220121 in words is "two trillion, twenty-one billion, ten million, two hundred twenty thousand, one hundred twenty-one".