202121211213212 has 6 divisors (see below), whose sum is σ = 353712119623128. Its totient is φ = 101060605606604.

The previous prime is 202121211213193. The next prime is 202121211213239. The reversal of 202121211213212 is 212312112121202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25265151401648 + ... + 25265151401655.

It is an arithmetic number, because the mean of its divisors is an integer number (58952019937188).

Almost surely, 2^{202121211213212} is an apocalyptic number.

It is an amenable number.

202121211213212 is a deficient number, since it is larger than the sum of its proper divisors (151590908409916).

202121211213212 is a wasteful number, since it uses less digits than its factorization.

202121211213212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50530302803307 (or 50530302803305 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 202121211213212 its reverse (212312112121202), we get a palindrome (414433323334414).

The spelling of 202121211213212 in words is "two hundred two trillion, one hundred twenty-one billion, two hundred eleven million, two hundred thirteen thousand, two hundred twelve".