20010102102 has 24 divisors (see below), whose sum is σ = 43358755440. Its totient is φ = 6669490320.

The previous prime is 20010102089. The next prime is 20010102139. The reversal of 20010102102 is 20120101002.

It is a super-2 number, since 2×20010102102² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 225327 + ... + 301317.

It is an arithmetic number, because the mean of its divisors is an integer number (1806614810).

Almost surely, 2^20010102102 is an apocalyptic number.

20010102102 is an abundant number, since it is smaller than the sum of its proper divisors (23348653338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20010102102 is a wasteful number, since it uses less digits than its factorization.

20010102102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90628 (or 90625 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20010102102 its reverse (20120101002), we get a palindrome (40130203104).

The spelling of 20010102102 in words is "twenty billion, ten million, one hundred two thousand, one hundred two".