55212121252 has 6 divisors (see below), whose sum is σ = 96621212198. Its totient is φ = 27606060624.

The previous prime is 55212121219. The next prime is 55212121273. The reversal of 55212121252 is 25212121255.

55212121252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 53405361216 + 1806760036 = 231096^2 + 42506^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55212121252.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6901515153 + ... + 6901515160.

Almost surely, 2^55212121252 is an apocalyptic number.

It is an amenable number.

55212121252 is a deficient number, since it is larger than the sum of its proper divisors (41409090946).

55212121252 is a wasteful number, since it uses less digits than its factorization.

55212121252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13803030317 (or 13803030315 counting only the distinct ones).

The product of its digits is 4000, while the sum is 28.

The spelling of 55212121252 in words is "fifty-five billion, two hundred twelve million, one hundred twenty-one thousand, two hundred fifty-two".