22121010012004 has 6 divisors (see below), whose sum is σ = 38711767521014. Its totient is φ = 11060505006000.

The previous prime is 22121010011993. The next prime is 22121010012103. The reversal of 22121010012004 is 40021001012122.

It can be written as a sum of positive squares in only one way, i.e., 19975107299904 + 2145902712100 = 4469352^2 + 1464890^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2765126251497 + ... + 2765126251504.

Almost surely, 2^{22121010012004} is an apocalyptic number.

It is an amenable number.

22121010012004 is a deficient number, since it is larger than the sum of its proper divisors (16590757509010).

22121010012004 is a wasteful number, since it uses less digits than its factorization.

22121010012004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5530252503005 (or 5530252503003 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22121010012004 its reverse (40021001012122), we get a palindrome (62142011024126).

The spelling of 22121010012004 in words is "twenty-two trillion, one hundred twenty-one billion, ten million, twelve thousand, four".