20101212097 has 16 divisors (see below), whose sum is σ = 21811151232. Its totient is φ = 18455374080.

The previous prime is 20101212083. The next prime is 20101212113. The reversal of 20101212097 is 79021210102.

It is not a de Polignac number, because 20101212097 - 2⁷ = 20101211969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20101212067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31647 + ... + 202987.

It is an arithmetic number, because the mean of its divisors is an integer number (1363196952).

Almost surely, 2^20101212097 is an apocalyptic number.

It is an amenable number.

20101212097 is a deficient number, since it is larger than the sum of its proper divisors (1709939135).

20101212097 is a wasteful number, since it uses less digits than its factorization.

20101212097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171528.

The product of its (nonzero) digits is 504, while the sum is 25.

Adding to 20101212097 its reverse (79021210102), we get a palindrome (99122422199).

The spelling of 20101212097 in words is "twenty billion, one hundred one million, two hundred twelve thousand, ninety-seven".