212021022015 has 64 divisors (see below), whose sum is σ = 429070279680. Its totient is φ = 98328574080.

The previous prime is 212021022001. The next prime is 212021022023. The reversal of 212021022015 is 510220120212.

It is not a de Polignac number, because 212021022015 - 2⁶ = 212021021951 is a prime.

It is a super-2 number, since 2×212021022015² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3069652 + ... + 3137961.

It is an arithmetic number, because the mean of its divisors is an integer number (6704223120).

Almost surely, 2^212021022015 is an apocalyptic number.

212021022015 is an abundant number, since it is smaller than the sum of its proper divisors (217049257665).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212021022015 is a wasteful number, since it uses less digits than its factorization.

212021022015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6207661 (or 6207655 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 212021022015 its reverse (510220120212), we get a palindrome (722241142227).

The spelling of 212021022015 in words is "two hundred twelve billion, twenty-one million, twenty-two thousand, fifteen".