202120421012 has 6 divisors (see below), whose sum is σ = 353710736778. Its totient is φ = 101060210504.

The previous prime is 202120420969. The next prime is 202120421021. The reversal of 202120421012 is 210124021202.

It can be written as a sum of positive squares in only one way, i.e., 202107790096 + 12630916 = 449564^2 + 3554^2 .

It is a super-2 number, since 2×202120421012² (a number of 23 digits) contains 22 as substring.

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, 25265052623 + ... + 25265052630.

It is an arithmetic number, because the mean of its divisors is an integer number (58951789463).

Almost surely, 2^202120421012 is an apocalyptic number.

It is an amenable number.

202120421012 is a deficient number, since it is larger than the sum of its proper divisors (151590315766).

202120421012 is a wasteful number, since it uses less digits than its factorization.

202120421012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50530105257 (or 50530105255 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202120421012 its reverse (210124021202), we get a palindrome (412244442214).

The spelling of 202120421012 in words is "two hundred two billion, one hundred twenty million, four hundred twenty-one thousand, twelve".