20211212195 has 16 divisors (see below), whose sum is σ = 26306477568. Its totient is φ = 14846684160.

The previous prime is 20211212143. The next prime is 20211212207. The reversal of 20211212195 is 59121211202.

It is not a de Polignac number, because 20211212195 - 2⁸ = 20211211939 is a prime.

It is a Duffinian 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, 2896259 + ... + 2903228.

It is an arithmetic number, because the mean of its divisors is an integer number (1644154848).

Almost surely, 2^20211212195 is an apocalyptic number.

20211212195 is a deficient number, since it is larger than the sum of its proper divisors (6095265373).

20211212195 is a wasteful number, since it uses less digits than its factorization.

20211212195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5799550.

The product of its (nonzero) digits is 720, while the sum is 26.

Adding to 20211212195 its reverse (59121211202), we get a palindrome (79332423397).

The spelling of 20211212195 in words is "twenty billion, two hundred eleven million, two hundred twelve thousand, one hundred ninety-five".