21310110121000 has 64 divisors (see below), whose sum is σ = 52033729812480. Its totient is φ = 8153433428800.

The previous prime is 21310110120989. The next prime is 21310110121031. The reversal of 21310110121000 is 12101101312.

It is a happy number.

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, 463240264 + ... + 463286263.

It is an arithmetic number, because the mean of its divisors is an integer number (813027028320).

Almost surely, 2^{21310110121000} is an apocalyptic number.

21310110121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21310110121000 is an abundant number, since it is smaller than the sum of its proper divisors (30723619691480).

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

21310110121000 is a wasteful number, since it uses less digits than its factorization.

21310110121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926526571 (or 926526557 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21310110121000 its reverse (12101101312), we get a palindrome (21322211222312).

The spelling of 21310110121000 in words is "twenty-one trillion, three hundred ten billion, one hundred ten million, one hundred twenty-one thousand".