121769662906 has 4 divisors (see below), whose sum is σ = 182654494362. Its totient is φ = 60884831452.

The previous prime is 121769662811. The next prime is 121769662919. The reversal of 121769662906 is 609266967121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 64181662281 + 57588000625 = 253341^2 + 239975^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30442415725 + ... + 30442415728.

Almost surely, 2^121769662906 is an apocalyptic number.

121769662906 is a deficient number, since it is larger than the sum of its proper divisors (60884831456).

121769662906 is an equidigital number, since it uses as much as digits as its factorization.

121769662906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60884831455.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 121769662906 in words is "one hundred twenty-one billion, seven hundred sixty-nine million, six hundred sixty-two thousand, nine hundred six".