202120100102 has 4 divisors (see below), whose sum is σ = 303180150156. Its totient is φ = 101060050050.

The previous prime is 202120100093. The next prime is 202120100137. The reversal of 202120100102 is 201001021202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201001021202 = 2 ⋅100500510601.

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, 50530025024 + ... + 50530025027.

It is an arithmetic number, because the mean of its divisors is an integer number (75795037539).

Almost surely, 2^202120100102 is an apocalyptic number.

202120100102 is a deficient number, since it is larger than the sum of its proper divisors (101060050054).

202120100102 is a wasteful number, since it uses less digits than its factorization.

202120100102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101060050053.

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

Adding to 202120100102 its reverse (201001021202), we get a palindrome (403121121304).

The spelling of 202120100102 in words is "two hundred two billion, one hundred twenty million, one hundred thousand, one hundred two".