202021100021212 has 48 divisors (see below), whose sum is σ = 359274534373440. Its totient is φ = 99383527544832.

The previous prime is 202021100021189. The next prime is 202021100021231. The reversal of 202021100021212 is 212120001120202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 904518489 + ... + 904741807.

It is an arithmetic number, because the mean of its divisors is an integer number (7484886132780).

Almost surely, 2^{202021100021212} is an apocalyptic number.

It is an amenable number.

202021100021212 is a deficient number, since it is larger than the sum of its proper divisors (157253434352228).

202021100021212 is a wasteful number, since it uses less digits than its factorization.

202021100021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237070 (or 237068 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 202021100021212 its reverse (212120001120202), we get a palindrome (414141101141414).

The spelling of 202021100021212 in words is "two hundred two trillion, twenty-one billion, one hundred million, twenty-one thousand, two hundred twelve".