101201011220 has 24 divisors (see below), whose sum is σ = 225023425704. Its totient is φ = 38099204096.

The previous prime is 101201011211. The next prime is 101201011253. The reversal of 101201011220 is 22110102101.

It can be written as a sum of positive squares in 4 ways, for example, as 898320784 + 100302690436 = 29972^2 + 316706^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148824677 + ... + 148825356.

It is an arithmetic number, because the mean of its divisors is an integer number (9375976071).

Almost surely, 2^101201011220 is an apocalyptic number.

101201011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101201011220 is an abundant number, since it is smaller than the sum of its proper divisors (123822414484).

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

101201011220 is a wasteful number, since it uses less digits than its factorization.

101201011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297650059 (or 297650057 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101201011220 its reverse (22110102101), we get a palindrome (123311113321).

The spelling of 101201011220 in words is "one hundred one billion, two hundred one million, eleven thousand, two hundred twenty".