202111021212 has 24 divisors (see below), whose sum is σ = 474416294016. Its totient is φ = 66966924528.

The previous prime is 202111021193. The next prime is 202111021237. The reversal of 202111021212 is 212120111202.

It is a junction number, because it is equal to n+sod(n) for n = 202111021191 and 202111021200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50424898 + ... + 50428905.

It is an arithmetic number, because the mean of its divisors is an integer number (19767345584).

Almost surely, 2^202111021212 is an apocalyptic number.

It is an amenable number.

202111021212 is an abundant number, since it is smaller than the sum of its proper divisors (272305272804).

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

202111021212 is a wasteful number, since it uses less digits than its factorization.

202111021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100853977 (or 100853975 counting only the distinct ones).

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

Adding to 202111021212 its reverse (212120111202), we get a palindrome (414231132414).

The spelling of 202111021212 in words is "two hundred two billion, one hundred eleven million, twenty-one thousand, two hundred twelve".