121687922 has 4 divisors (see below), whose sum is σ = 182531886. Its totient is φ = 60843960.

The previous prime is 121687873. The next prime is 121687939. The reversal of 121687922 is 229786121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 229786121 = 4363 ⋅52667.

It can be written as a sum of positive squares in only one way, i.e., 116402521 + 5285401 = 10789^2 + 2299^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30421979 + ... + 30421982.

Almost surely, 2^121687922 is an apocalyptic number.

121687922 is a deficient number, since it is larger than the sum of its proper divisors (60843964).

121687922 is an equidigital number, since it uses as much as digits as its factorization.

121687922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60843963.

The product of its digits is 24192, while the sum is 38.

The square root of 121687922 is about 11031.2248639940. The cubic root of 121687922 is about 495.5443075560.

The spelling of 121687922 in words is "one hundred twenty-one million, six hundred eighty-seven thousand, nine hundred twenty-two".