88419361221 has 12 divisors (see below), whose sum is σ = 128264999148. Its totient is φ = 58693251264.

The previous prime is 88419361211. The next prime is 88419361231. The reversal of 88419361221 is 12216391488.

88419361221 is a `hidden beast` number, since 8 + 8 + 4 + 1 + 9 + 3 + 612 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (88419361211) and next prime (88419361231).

It can be written as a sum of positive squares in 2 ways, for example, as 11704210596 + 76715150625 = 108186^2 + 276975^2 .

It is not a de Polignac number, because 88419361221 - 2⁶ = 88419361157 is a prime.

It is a super-2 number, since 2×88419361221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88419361211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21080250 + ... + 21084443.

It is an arithmetic number, because the mean of its divisors is an integer number (10688749929).

Almost surely, 2^88419361221 is an apocalyptic number.

It is an amenable number.

88419361221 is a deficient number, since it is larger than the sum of its proper divisors (39845637927).

88419361221 is a wasteful number, since it uses less digits than its factorization.

88419361221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42164932 (or 42164929 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The spelling of 88419361221 in words is "eighty-eight billion, four hundred nineteen million, three hundred sixty-one thousand, two hundred twenty-one".