21020202011110 has 24 divisors (see below), whose sum is σ = 39552947234640. Its totient is φ = 8042512071792.

The previous prime is 21020202011101. The next prime is 21020202011113. The reversal of 21020202011110 is 1111020202012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020202011113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1986781290 + ... + 1986791869.

It is an arithmetic number, because the mean of its divisors is an integer number (1648039468110).

Almost surely, 2^{21020202011110} is an apocalyptic number.

21020202011110 is a deficient number, since it is larger than the sum of its proper divisors (18532745223530).

21020202011110 is a wasteful number, since it uses less digits than its factorization.

21020202011110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973573212 (or 3973573189 counting only the distinct ones).

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

Adding to 21020202011110 its reverse (1111020202012), we get a palindrome (22131222213122).

The spelling of 21020202011110 in words is "twenty-one trillion, twenty billion, two hundred two million, eleven thousand, one hundred ten".