20121123310 has 32 divisors (see below), whose sum is σ = 38223912960. Its totient is φ = 7604911008.

The previous prime is 20121123241. The next prime is 20121123391. The reversal of 20121123310 is 1332112102.

It is a super-2 number, since 2×20121123310² (a number of 21 digits) contains 22 as substring.

It is a congruent 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, 65482 + ... + 211021.

It is an arithmetic number, because the mean of its divisors is an integer number (1194497280).

Almost surely, 2^20121123310 is an apocalyptic number.

20121123310 is a deficient number, since it is larger than the sum of its proper divisors (18102789650).

20121123310 is a wasteful number, since it uses less digits than its factorization.

20121123310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276912.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20121123310 its reverse (1332112102), we get a palindrome (21453235412).

The spelling of 20121123310 in words is "twenty billion, one hundred twenty-one million, one hundred twenty-three thousand, three hundred ten".