101002001220 has 96 divisors (see below), whose sum is σ = 316337616000. Its totient is φ = 26753081472.

The previous prime is 101002001209. The next prime is 101002001237. The reversal of 101002001220 is 22100200101.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 547194 + ... + 708113.

It is an arithmetic number, because the mean of its divisors is an integer number (3295183500).

Almost surely, 2^101002001220 is an apocalyptic number.

101002001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101002001220 is an abundant number, since it is smaller than the sum of its proper divisors (215335614780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101002001220 is a wasteful number, since it uses less digits than its factorization.

101002001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255474 (or 1255466 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 101002001220 its reverse (22100200101), we get a palindrome (123102201321).

The spelling of 101002001220 in words is "one hundred one billion, two million, one thousand, two hundred twenty".