20212111522 has 16 divisors (see below), whose sum is σ = 30988564992. Its totient is φ = 9882941760.

The previous prime is 20212111501. The next prime is 20212111531. The reversal of 20212111522 is 22511121202.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20212111522.

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, 28378 + ... + 203050.

It is an arithmetic number, because the mean of its divisors is an integer number (1936785312).

Almost surely, 2^20212111522 is an apocalyptic number.

20212111522 is a deficient number, since it is larger than the sum of its proper divisors (10776453470).

20212111522 is a wasteful number, since it uses less digits than its factorization.

20212111522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175953.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 20212111522 its reverse (22511121202), we get a palindrome (42723232724).

The spelling of 20212111522 in words is "twenty billion, two hundred twelve million, one hundred eleven thousand, five hundred twenty-two".