20121021310 has 16 divisors (see below), whose sum is σ = 39003826176. Its totient is φ = 7429300128.

The previous prime is 20121021233. The next prime is 20121021331. The reversal of 20121021310 is 1312012102.

It is a super-2 number, since 2×20121021310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77388414 + ... + 77388673.

It is an arithmetic number, because the mean of its divisors is an integer number (2437739136).

Almost surely, 2^20121021310 is an apocalyptic number.

20121021310 is a deficient number, since it is larger than the sum of its proper divisors (18882804866).

20121021310 is a wasteful number, since it uses less digits than its factorization.

20121021310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154777107.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20121021310 its reverse (1312012102), we get a palindrome (21433033412).

The spelling of 20121021310 in words is "twenty billion, one hundred twenty-one million, twenty-one thousand, three hundred ten".