200121202102 has 4 divisors (see below), whose sum is σ = 300181803156. Its totient is φ = 100060601050.

The previous prime is 200121202087. The next prime is 200121202109. The reversal of 200121202102 is 201202121002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121202109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50030300524 + ... + 50030300527.

It is an arithmetic number, because the mean of its divisors is an integer number (75045450789).

Almost surely, 2^200121202102 is an apocalyptic number.

200121202102 is a deficient number, since it is larger than the sum of its proper divisors (100060601054).

200121202102 is a wasteful number, since it uses less digits than its factorization.

200121202102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100060601053.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 200121202102 its reverse (201202121002), we get a palindrome (401323323104).

The spelling of 200121202102 in words is "two hundred billion, one hundred twenty-one million, two hundred two thousand, one hundred two".