202121012 has 48 divisors (see below), whose sum is σ = 383140800. Its totient is φ = 93259296.

The previous prime is 202120979. The next prime is 202121053. The reversal of 202121012 is 210121202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 202120984 and 202121002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1454039 + ... + 1454177.

It is an arithmetic number, because the mean of its divisors is an integer number (7982100).

Almost surely, 2^202121012 is an apocalyptic number.

It is an amenable number.

202121012 is a deficient number, since it is larger than the sum of its proper divisors (181019788).

202121012 is a wasteful number, since it uses less digits than its factorization.

202121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 202121012 is about 14216.9269534594. The cubic root of 202121012 is about 586.8635747142.

Adding to 202121012 its reverse (210121202), we get a palindrome (412242214).

The spelling of 202121012 in words is "two hundred two million, one hundred twenty-one thousand, twelve".