21100010031210 has 64 divisors (see below), whose sum is σ = 55252075497984. Its totient is φ = 5114374977600.

The previous prime is 21100010031197. The next prime is 21100010031227. The reversal of 21100010031210 is 1213001000112.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2696844 + ... + 7033703.

It is an arithmetic number, because the mean of its divisors is an integer number (863313679656).

Almost surely, 2^{21100010031210} is an apocalyptic number.

21100010031210 is an abundant number, since it is smaller than the sum of its proper divisors (34152065466774).

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

21100010031210 is a wasteful number, since it uses less digits than its factorization.

21100010031210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9737139.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21100010031210 its reverse (1213001000112), we get a palindrome (22313011031322).

The spelling of 21100010031210 in words is "twenty-one trillion, one hundred billion, ten million, thirty-one thousand, two hundred ten".