11870621510121 has 60 divisors (see below), whose sum is σ = 19859028049476. Its totient is φ = 7058573945280.

The previous prime is 11870621510087. The next prime is 11870621510147. The reversal of 11870621510121 is 12101512607811.

It is a happy number.

11870621510121 is a `hidden beast` number, since 1 + 1 + 8 + 7 + 0 + 621 + 5 + 1 + 0 + 1 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4043272402521 + 7827349107600 = 2010789^2 + 2797740^2 .

It is not a de Polignac number, because 11870621510121 - 2⁹ = 11870621509609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11870621510621) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 10906626 + ... + 11945531.

Almost surely, 2^{11870621510121} is an apocalyptic number.

11870621510121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11870621510121 is a deficient number, since it is larger than the sum of its proper divisors (7988406539355).

11870621510121 is a wasteful number, since it uses less digits than its factorization.

11870621510121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22852244 (or 22852224 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 36.

The spelling of 11870621510121 in words is "eleven trillion, eight hundred seventy billion, six hundred twenty-one million, five hundred ten thousand, one hundred twenty-one".