151218121970 has 8 divisors (see below), whose sum is σ = 272192619564. Its totient is φ = 60487248784.

The previous prime is 151218121963. The next prime is 151218121981. The reversal of 151218121970 is 79121812151.

It can be written as a sum of positive squares in 2 ways, for example, as 146867532289 + 4350589681 = 383233^2 + 65959^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7560906089 + ... + 7560906108.

Almost surely, 2^151218121970 is an apocalyptic number.

151218121970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

151218121970 is a deficient number, since it is larger than the sum of its proper divisors (120974497594).

151218121970 is a wasteful number, since it uses less digits than its factorization.

151218121970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15121812204.

The product of its (nonzero) digits is 10080, while the sum is 38.

The spelling of 151218121970 in words is "one hundred fifty-one billion, two hundred eighteen million, one hundred twenty-one thousand, nine hundred seventy".