221122222002021 has 16 divisors (see below), whose sum is σ = 306561724328448. Its totient is φ = 141618187852800.

The previous prime is 221122222001977. The next prime is 221122222002029. The reversal of 221122222002021 is 120200222221122.

It is not a de Polignac number, because 221122222002021 - 2²⁷ = 221122087784293 is a prime.

It is a super-2 number, since 2×221122222002021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221122222002029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8677572300 + ... + 8677597781.

It is an arithmetic number, because the mean of its divisors is an integer number (19160107770528).

Almost surely, 2^{221122222002021} is an apocalyptic number.

It is an amenable number.

221122222002021 is a deficient number, since it is larger than the sum of its proper divisors (85439502326427).

221122222002021 is a wasteful number, since it uses less digits than its factorization.

221122222002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17355170252.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 221122222002021 its reverse (120200222221122), we get a palindrome (341322444223143).

The spelling of 221122222002021 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, two hundred twenty-two million, two thousand, twenty-one".