21021021102110 has 32 divisors (see below), whose sum is σ = 40676735139840. Its totient is φ = 7796374228512.

The previous prime is 21021021102101. The next prime is 21021021102113. The reversal of 21021021102110 is 1120112012012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021021102113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1176979934 + ... + 1176997793.

It is an arithmetic number, because the mean of its divisors is an integer number (1271147973120).

Almost surely, 2^{21021021102110} is an apocalyptic number.

21021021102110 is a deficient number, since it is larger than the sum of its proper divisors (19655714037730).

21021021102110 is a wasteful number, since it uses less digits than its factorization.

21021021102110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353977800.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21021021102110 its reverse (1120112012012), we get a palindrome (22141133114122).

The spelling of 21021021102110 in words is "twenty-one trillion, twenty-one billion, twenty-one million, one hundred two thousand, one hundred ten".