210202021212 has 12 divisors (see below), whose sum is σ = 490471382856. Its totient is φ = 70067340400.

The previous prime is 210202021193. The next prime is 210202021261. The reversal of 210202021212 is 212120202012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×210202021212² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210202021191 and 210202021200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8758417539 + ... + 8758417562.

It is an arithmetic number, because the mean of its divisors is an integer number (40872615238).

Almost surely, 2^210202021212 is an apocalyptic number.

It is an amenable number.

210202021212 is an abundant number, since it is smaller than the sum of its proper divisors (280269361644).

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

210202021212 is a wasteful number, since it uses less digits than its factorization.

210202021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17516835108 (or 17516835106 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 210202021212 its reverse (212120202012), we get a palindrome (422322223224).

The spelling of 210202021212 in words is "two hundred ten billion, two hundred two million, twenty-one thousand, two hundred twelve".