222561836021 has 8 divisors (see below), whose sum is σ = 254381082624. Its totient is φ = 190748764080.

The previous prime is 222561835999. The next prime is 222561836023. The reversal of 222561836021 is 120638165222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 222561836021 - 2⁶ = 222561835957 is a prime.

It is a super-2 number, since 2×222561836021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222561836023) 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, 1466165 + ... + 1610826.

It is an arithmetic number, because the mean of its divisors is an integer number (31797635328).

Almost surely, 2^222561836021 is an apocalyptic number.

It is an amenable number.

222561836021 is a deficient number, since it is larger than the sum of its proper divisors (31819246603).

222561836021 is a wasteful number, since it uses less digits than its factorization.

222561836021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3087331.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 222561836021 in words is "two hundred twenty-two billion, five hundred sixty-one million, eight hundred thirty-six thousand, twenty-one".