2021012101121 has 16 divisors (see below), whose sum is σ = 2219511792960. Its totient is φ = 1829003741760.

The previous prime is 2021012101081. The next prime is 2021012101159. The reversal of 2021012101121 is 1211012101202.

It is a de Polignac number, because none of the positive numbers 2^k-2021012101121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021012101096 and 2021012101105.

It is not an unprimeable number, because it can be changed into a prime (2021017101121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7007666 + ... + 7290363.

It is an arithmetic number, because the mean of its divisors is an integer number (138719487060).

Almost surely, 2^{2021012101121} is an apocalyptic number.

It is an amenable number.

2021012101121 is a deficient number, since it is larger than the sum of its proper divisors (198499691839).

2021012101121 is a wasteful number, since it uses less digits than its factorization.

2021012101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14298256.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2021012101121 its reverse (1211012101202), we get a palindrome (3232024202323).

The spelling of 2021012101121 in words is "two trillion, twenty-one billion, twelve million, one hundred one thousand, one hundred twenty-one".