201212112021 has 16 divisors (see below), whose sum is σ = 291512739840. Its totient is φ = 122981934960.

The previous prime is 201212111977. The next prime is 201212112041. The reversal of 201212112021 is 120211212102.

It is not a de Polignac number, because 201212112021 - 2¹⁰ = 201212110997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212112041) 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, 56934315 + ... + 56937848.

It is an arithmetic number, because the mean of its divisors is an integer number (18219546240).

Almost surely, 2^201212112021 is an apocalyptic number.

It is an amenable number.

201212112021 is a deficient number, since it is larger than the sum of its proper divisors (90300627819).

201212112021 is a wasteful number, since it uses less digits than its factorization.

201212112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113872216.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201212112021 its reverse (120211212102), we get a palindrome (321423324123).

The spelling of 201212112021 in words is "two hundred one billion, two hundred twelve million, one hundred twelve thousand, twenty-one".