101220444999 has 24 divisors (see below), whose sum is σ = 152631284832. Its totient is φ = 64517967360.

The previous prime is 101220444973. The next prime is 101220445049. The reversal of 101220444999 is 999444022101.

It is a happy number.

It is not a de Polignac number, because 101220444999 - 2⁹ = 101220444487 is a prime.

It is a super-2 number, since 2×101220444999² (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 (101220443999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 369039 + ... + 581919.

It is an arithmetic number, because the mean of its divisors is an integer number (6359636868).

Almost surely, 2^101220444999 is an apocalyptic number.

101220444999 is a deficient number, since it is larger than the sum of its proper divisors (51410839833).

101220444999 is a wasteful number, since it uses less digits than its factorization.

101220444999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215207 (or 215204 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 101220444999 in words is "one hundred one billion, two hundred twenty million, four hundred forty-four thousand, nine hundred ninety-nine".