2021011220001 has 32 divisors (see below), whose sum is σ = 2946911760000. Its totient is φ = 1227123813888.

The previous prime is 2021011219921. The next prime is 2021011220017. The reversal of 2021011220001 is 1000221101202.

It is not a de Polignac number, because 2021011220001 - 2²⁵ = 2020977665569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2021011220071) 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, 2238526 + ... + 3008823.

It is an arithmetic number, because the mean of its divisors is an integer number (92090992500).

Almost surely, 2^{2021011220001} is an apocalyptic number.

It is an amenable number.

2021011220001 is a deficient number, since it is larger than the sum of its proper divisors (925900539999).

2021011220001 is a wasteful number, since it uses less digits than its factorization.

2021011220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5247633.

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

Adding to 2021011220001 its reverse (1000221101202), we get a palindrome (3021232321203).

The spelling of 2021011220001 in words is "two trillion, twenty-one billion, eleven million, two hundred twenty thousand, one".