212011120021001 has 24 divisors (see below), whose sum is σ = 251295139165824. Its totient is φ = 178283249420640.

The previous prime is 212011120020991. The next prime is 212011120021021. The reversal of 212011120021001 is 100120021110212.

It is not a de Polignac number, because 212011120021001 - 2¹⁸ = 212011119758857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212011120021021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36597536 + ... + 41992878.

It is an arithmetic number, because the mean of its divisors is an integer number (10470630798576).

Almost surely, 2^{212011120021001} is an apocalyptic number.

It is an amenable number.

212011120021001 is a deficient number, since it is larger than the sum of its proper divisors (39284019144823).

212011120021001 is a wasteful number, since it uses less digits than its factorization.

212011120021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5410541 (or 5410534 counting only the distinct ones).

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

Adding to 212011120021001 its reverse (100120021110212), we get a palindrome (312131141131213).

The spelling of 212011120021001 in words is "two hundred twelve trillion, eleven billion, one hundred twenty million, twenty-one thousand, one".