21020010102010 has 32 divisors (see below), whose sum is σ = 38400868882944. Its totient is φ = 8282678880000.

The previous prime is 21020010101977. The next prime is 21020010102103. The reversal of 21020010102010 is 1020101002012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11472706 + ... + 13178125.

It is an arithmetic number, because the mean of its divisors is an integer number (1200027152592).

Almost surely, 2^{21020010102010} is an apocalyptic number.

21020010102010 is a deficient number, since it is larger than the sum of its proper divisors (17380858780934).

21020010102010 is a wasteful number, since it uses less digits than its factorization.

21020010102010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24652110.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21020010102010 its reverse (1020101002012), we get a palindrome (22040111104022).

The spelling of 21020010102010 in words is "twenty-one trillion, twenty billion, ten million, one hundred two thousand, ten".