1202101999957 has 4 divisors (see below), whose sum is σ = 1202448530380. Its totient is φ = 1201755469536.

The previous prime is 1202101999951. The next prime is 1202101999997. The reversal of 1202101999957 is 7599991012021.

It is a happy number.

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 679559517316 + 522542482641 = 824354^2 + 722871^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202101999957 - 2³¹ = 1199954516309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202101999898 and 1202101999907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202101999951) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 173260008 + ... + 173266945.

It is an arithmetic number, because the mean of its divisors is an integer number (300612132595).

Almost surely, 2^{1202101999957} is an apocalyptic number.

It is an amenable number.

1202101999957 is a deficient number, since it is larger than the sum of its proper divisors (346530423).

1202101999957 is an equidigital number, since it uses as much as digits as its factorization.

1202101999957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346530422.

The product of its (nonzero) digits is 918540, while the sum is 55.

The spelling of 1202101999957 in words is "one trillion, two hundred two billion, one hundred one million, nine hundred ninety-nine thousand, nine hundred fifty-seven".