212021123202 has 72 divisors (see below), whose sum is σ = 534586799916. Its totient is φ = 60553995264.

The previous prime is 212021123183. The next prime is 212021123219. The reversal of 212021123202 is 202321120212.

It can be written as a sum of positive squares in 2 ways, for example, as 199870690761 + 12150432441 = 447069^2 + 110229^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2298238 + ... + 2388710.

Almost surely, 2^212021123202 is an apocalyptic number.

212021123202 is an abundant number, since it is smaller than the sum of its proper divisors (322565676714).

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

212021123202 is a wasteful number, since it uses less digits than its factorization.

212021123202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93152 (or 93142 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 212021123202 its reverse (202321120212), we get a palindrome (414342243414).

The spelling of 212021123202 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-three thousand, two hundred two".