210121202120202 has 48 divisors (see below), whose sum is σ = 456382964157120. Its totient is φ = 69868095964416.

The previous prime is 210121202120173. The next prime is 210121202120227. The reversal of 210121202120202 is 202021202121012.

It is a happy number.

210121202120202 is a `hidden beast` number, since 21 + 0 + 121 + 202 + 120 + 202 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40901818 + ... + 45751514.

It is an arithmetic number, because the mean of its divisors is an integer number (9507978419940).

Almost surely, 2^{210121202120202} is an apocalyptic number.

210121202120202 is an abundant number, since it is smaller than the sum of its proper divisors (246261762036918).

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

210121202120202 is a wasteful number, since it uses less digits than its factorization.

210121202120202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4855627 (or 4855624 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 210121202120202 its reverse (202021202121012), we get a palindrome (412142404241214).

The spelling of 210121202120202 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred two million, one hundred twenty thousand, two hundred two".