20211002102 has 4 divisors (see below), whose sum is σ = 30316503156. Its totient is φ = 10105501050.

The previous prime is 20211002099. The next prime is 20211002113. The reversal of 20211002102 is 20120011202.

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, 5052750524 + ... + 5052750527.

It is an arithmetic number, because the mean of its divisors is an integer number (7579125789).

Almost surely, 2^20211002102 is an apocalyptic number.

20211002102 is a deficient number, since it is larger than the sum of its proper divisors (10105501054).

20211002102 is a wasteful number, since it uses less digits than its factorization.

20211002102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10105501053.

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

Adding to 20211002102 its reverse (20120011202), we get a palindrome (40331013304).

It can be divided in two parts, 2021100 and 2102, that added together give a palindrome (2023202).

The spelling of 20211002102 in words is "twenty billion, two hundred eleven million, two thousand, one hundred two".