212120020001 has 16 divisors (see below), whose sum is σ = 223910117760. Its totient is φ = 200393066880.

The previous prime is 212120019919. The next prime is 212120020067. The reversal of 212120020001 is 100020021212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-212120020001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212120020901) 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, 16152500 + ... + 16165626.

It is an arithmetic number, because the mean of its divisors is an integer number (13994382360).

Almost surely, 2^212120020001 is an apocalyptic number.

It is an amenable number.

212120020001 is a deficient number, since it is larger than the sum of its proper divisors (11790097759).

212120020001 is a wasteful number, since it uses less digits than its factorization.

212120020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15464.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 212120020001 its reverse (100020021212), we get a palindrome (312140041213).

The spelling of 212120020001 in words is "two hundred twelve billion, one hundred twenty million, twenty thousand, one".