2121153356104 has 32 divisors (see below), whose sum is σ = 4122203254200. Its totient is φ = 1022039549440.

The previous prime is 2121153356089. The next prime is 2121153356111. The reversal of 2121153356104 is 4016533511212.

It can be written as a sum of positive squares in 4 ways, for example, as 1277691122500 + 843462233604 = 1130350^2 + 918402^2 .

It is a super-2 number, since 2×2121153356104² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2121153356104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8653507 + ... + 8895250.

Almost surely, 2^{2121153356104} is an apocalyptic number.

It is an amenable number.

2121153356104 is a deficient number, since it is larger than the sum of its proper divisors (2001049898096).

2121153356104 is a wasteful number, since it uses less digits than its factorization.

2121153356104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17549313 (or 17549309 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

Adding to 2121153356104 its reverse (4016533511212), we get a palindrome (6137686867316).

The spelling of 2121153356104 in words is "two trillion, one hundred twenty-one billion, one hundred fifty-three million, three hundred fifty-six thousand, one hundred four".