1121638917380 has 24 divisors (see below), whose sum is σ = 2355486291648. Its totient is φ = 448647078368.

The previous prime is 1121638917379. The next prime is 1121638917409. The reversal of 1121638917380 is 837198361211.

It is a happy number.

It is a super-3 number, since 3×1121638917380³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613097 + ... + 1618383.

It is an arithmetic number, because the mean of its divisors is an integer number (98145262152).

Almost surely, 2^{1121638917380} is an apocalyptic number.

1121638917380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121638917380 is an abundant number, since it is smaller than the sum of its proper divisors (1233847374268).

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

1121638917380 is a wasteful number, since it uses less digits than its factorization.

1121638917380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061083 (or 1061081 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 1121638917380 in words is "one trillion, one hundred twenty-one billion, six hundred thirty-eight million, nine hundred seventeen thousand, three hundred eighty".