1201621515396 has 12 divisors (see below), whose sum is σ = 2803783535952. Its totient is φ = 400540505128.

The previous prime is 1201621515373. The next prime is 1201621515449. The reversal of 1201621515396 is 6935151261021.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50067563130 + ... + 50067563153.

It is an arithmetic number, because the mean of its divisors is an integer number (233648627996).

Almost surely, 2^{1201621515396} is an apocalyptic number.

It is an amenable number.

1201621515396 is an abundant number, since it is smaller than the sum of its proper divisors (1602162020556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201621515396 is a wasteful number, since it uses less digits than its factorization.

1201621515396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100135126290 (or 100135126288 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 42.

The spelling of 1201621515396 in words is "one trillion, two hundred one billion, six hundred twenty-one million, five hundred fifteen thousand, three hundred ninety-six".