2161122050252 has 36 divisors (see below), whose sum is σ = 4225182518928. Its totient is φ = 966224450400.

The previous prime is 2161122050221. The next prime is 2161122050299. The reversal of 2161122050252 is 2520502211612.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36569888 + ... + 36628935.

Almost surely, 2^{2161122050252} is an apocalyptic number.

2161122050252 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2161122050252 is a deficient number, since it is larger than the sum of its proper divisors (2064060468676).

2161122050252 is a wasteful number, since it uses less digits than its factorization.

2161122050252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73198910 (or 73198897 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 2161122050252 its reverse (2520502211612), we get a palindrome (4681624261864).

The spelling of 2161122050252 in words is "two trillion, one hundred sixty-one billion, one hundred twenty-two million, fifty thousand, two hundred fifty-two".