10211112121021 has 16 divisors (see below), whose sum is σ = 11674283846400. Its totient is φ = 8749051413120.

The previous prime is 10211112120991. The next prime is 10211112121033. The reversal of 10211112121021 is 12012121111201.

It is a cyclic number.

It is not a de Polignac number, because 10211112121021 - 2⁷ = 10211112120893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10211112120986 and 10211112121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211112121081) 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, 237175905 + ... + 237218953.

It is an arithmetic number, because the mean of its divisors is an integer number (729642740400).

Almost surely, 2^{10211112121021} is an apocalyptic number.

It is an amenable number.

10211112121021 is a deficient number, since it is larger than the sum of its proper divisors (1463171725379).

10211112121021 is an equidigital number, since it uses as much as digits as its factorization.

10211112121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55164.

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

Adding to 10211112121021 its reverse (12012121111201), we get a palindrome (22223233232222).

The spelling of 10211112121021 in words is "ten trillion, two hundred eleven billion, one hundred twelve million, one hundred twenty-one thousand, twenty-one".