121219380 has 36 divisors (see below), whose sum is σ = 367699332. Its totient is φ = 32325120.

The previous prime is 121219379. The next prime is 121219421. The reversal of 121219380 is 83912121.

It can be written as a sum of positive squares in 2 ways, for example, as 84713616 + 36505764 = 9204^2 + 6042^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336541 + ... + 336900.

Almost surely, 2^121219380 is an apocalyptic number.

121219380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121219380 is an abundant number, since it is smaller than the sum of its proper divisors (246479952).

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

121219380 is a wasteful number, since it uses less digits than its factorization.

121219380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673456 (or 673451 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 121219380 is about 11009.9673024038. The cubic root of 121219380 is about 494.9074819437.

The spelling of 121219380 in words is "one hundred twenty-one million, two hundred nineteen thousand, three hundred eighty".