2021120102 has 4 divisors (see below), whose sum is σ = 3031680156. Its totient is φ = 1010560050.

The previous prime is 2021120077. The next prime is 2021120119. The reversal of 2021120102 is 2010211202.

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, 505280024 + ... + 505280027.

It is an arithmetic number, because the mean of its divisors is an integer number (757920039).

Almost surely, 2^2021120102 is an apocalyptic number.

2021120102 is a deficient number, since it is larger than the sum of its proper divisors (1010560054).

2021120102 is a wasteful number, since it uses less digits than its factorization.

2021120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010560053.

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

The square root of 2021120102 is about 44956.8693527474. The cubic root of 2021120102 is about 1264.3404732782.

Adding to 2021120102 its reverse (2010211202), we get a palindrome (4031331304).

The spelling of 2021120102 in words is "two billion, twenty-one million, one hundred twenty thousand, one hundred two".