20021100121102 has 4 divisors (see below), whose sum is σ = 30031650181656. Its totient is φ = 10010550060550.

The previous prime is 20021100121097. The next prime is 20021100121133. The reversal of 20021100121102 is 20112100112002.

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, 5005275030274 + ... + 5005275030277.

It is an arithmetic number, because the mean of its divisors is an integer number (7507912545414).

Almost surely, 2^{20021100121102} is an apocalyptic number.

20021100121102 is a deficient number, since it is larger than the sum of its proper divisors (10010550060554).

20021100121102 is a wasteful number, since it uses less digits than its factorization.

20021100121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010550060553.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20021100121102 its reverse (20112100112002), we get a palindrome (40133200233104).

The spelling of 20021100121102 in words is "twenty trillion, twenty-one billion, one hundred million, one hundred twenty-one thousand, one hundred two".