2120105553525 has 18 divisors (see below), whose sum is σ = 3797344614050. Its totient is φ = 1130722961760.

The previous prime is 2120105553499. The next prime is 2120105553569. The reversal of 2120105553525 is 5253555010212.

2120105553525 is a `hidden beast` number, since 2 + 1 + 20 + 10 + 55 + 53 + 525 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 2783723121 + 2117321830404 = 52761^2 + 1455102^2 .

It is not a de Polignac number, because 2120105553525 - 2¹¹ = 2120105551477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2120105553525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4711345450 + ... + 4711345899.

Almost surely, 2^{2120105553525} is an apocalyptic number.

2120105553525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2120105553525 is a deficient number, since it is larger than the sum of its proper divisors (1677239060525).

2120105553525 is a wasteful number, since it uses less digits than its factorization.

2120105553525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9422691365 (or 9422691357 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 2120105553525 in words is "two trillion, one hundred twenty billion, one hundred five million, five hundred fifty-three thousand, five hundred twenty-five".