20002121102 has 4 divisors (see below), whose sum is σ = 30003181656. Its totient is φ = 10001060550.

The previous prime is 20002121071. The next prime is 20002121129. The reversal of 20002121102 is 20112120002.

It is a happy number.

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

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, 5000530274 + ... + 5000530277.

It is an arithmetic number, because the mean of its divisors is an integer number (7500795414).

Almost surely, 2^20002121102 is an apocalyptic number.

20002121102 is a deficient number, since it is larger than the sum of its proper divisors (10001060554).

20002121102 is a wasteful number, since it uses less digits than its factorization.

20002121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10001060553.

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

Adding to 20002121102 its reverse (20112120002), we get a palindrome (40114241104).

The spelling of 20002121102 in words is "twenty billion, two million, one hundred twenty-one thousand, one hundred two".