222221011221999 has 8 divisors (see below), whose sum is σ = 329216312921520. Its totient is φ = 148147340814648.

The previous prime is 222221011221983. The next prime is 222221011222031. The reversal of 222221011221999 is 999122110122222.

222221011221999 is a `hidden beast` number, since 2 + 2 + 22 + 210 + 112 + 219 + 99 = 666.

It is not a de Polignac number, because 222221011221999 - 2⁴ = 222221011221983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221011221199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4115203911492 + ... + 4115203911545.

It is an arithmetic number, because the mean of its divisors is an integer number (41152039115190).

Almost surely, 2^{222221011221999} is an apocalyptic number.

222221011221999 is a deficient number, since it is larger than the sum of its proper divisors (106995301699521).

222221011221999 is an equidigital number, since it uses as much as digits as its factorization.

222221011221999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8230407823046 (or 8230407823040 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 222221011221999 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, eleven million, two hundred twenty-one thousand, nine hundred ninety-nine".