22121353154 has 4 divisors (see below), whose sum is σ = 33182029734. Its totient is φ = 11060676576.

The previous prime is 22121353099. The next prime is 22121353169. The reversal of 22121353154 is 45135312122.

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., 16223881129 + 5897472025 = 127373^2 + 76795^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5530338287 + ... + 5530338290.

Almost surely, 2^22121353154 is an apocalyptic number.

22121353154 is a deficient number, since it is larger than the sum of its proper divisors (11060676580).

22121353154 is a wasteful number, since it uses less digits than its factorization.

22121353154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11060676579.

The product of its digits is 7200, while the sum is 29.

Adding to 22121353154 its reverse (45135312122), we get a palindrome (67256665276).

The spelling of 22121353154 in words is "twenty-two billion, one hundred twenty-one million, three hundred fifty-three thousand, one hundred fifty-four".