1612200121157 has 4 divisors (see below), whose sum is σ = 1612338864396. Its totient is φ = 1612061377920.

The previous prime is 1612200121153. The next prime is 1612200121193. The reversal of 1612200121157 is 7511210022161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 486423948481 + 1125776172676 = 697441^2 + 1061026^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612200121157 - 2² = 1612200121153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1612200121153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69354188 + ... + 69377429.

It is an arithmetic number, because the mean of its divisors is an integer number (403084716099).

Almost surely, 2^{1612200121157} is an apocalyptic number.

It is an amenable number.

1612200121157 is a deficient number, since it is larger than the sum of its proper divisors (138743239).

1612200121157 is a wasteful number, since it uses less digits than its factorization.

1612200121157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138743238.

The product of its (nonzero) digits is 1680, while the sum is 29.

The spelling of 1612200121157 in words is "one trillion, six hundred twelve billion, two hundred million, one hundred twenty-one thousand, one hundred fifty-seven".