20123310212 has 24 divisors (see below), whose sum is σ = 35501813760. Its totient is φ = 9980055360.

The previous prime is 20123310211. The next prime is 20123310253. The reversal of 20123310212 is 21201332102.

It is a super-2 number, since 2×20123310212² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20123310211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686537 + ... + 715247.

It is an arithmetic number, because the mean of its divisors is an integer number (1479242240).

Almost surely, 2^20123310212 is an apocalyptic number.

It is an amenable number.

20123310212 is a deficient number, since it is larger than the sum of its proper divisors (15378503548).

20123310212 is a wasteful number, since it uses less digits than its factorization.

20123310212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30131 (or 30129 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20123310212 its reverse (21201332102), we get a palindrome (41324642314).

The spelling of 20123310212 in words is "twenty billion, one hundred twenty-three million, three hundred ten thousand, two hundred twelve".