21010103121320 has 64 divisors (see below), whose sum is σ = 47372073091200. Its totient is φ = 8386390920960.

The previous prime is 21010103121277. The next prime is 21010103121331. The reversal of 21010103121320 is 2312130101012.

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, 65779766 + ... + 66098394.

It is an arithmetic number, because the mean of its divisors is an integer number (740188642050).

Almost surely, 2^{21010103121320} is an apocalyptic number.

21010103121320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010103121320 is an abundant number, since it is smaller than the sum of its proper divisors (26361969969880).

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

21010103121320 is a wasteful number, since it uses less digits than its factorization.

21010103121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322098 (or 322094 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21010103121320 its reverse (2312130101012), we get a palindrome (23322233222332).

The spelling of 21010103121320 in words is "twenty-one trillion, ten billion, one hundred three million, one hundred twenty-one thousand, three hundred twenty".