10201211220 has 24 divisors (see below), whose sum is σ = 28563391584. Its totient is φ = 2720322976.

The previous prime is 10201211219. The next prime is 10201211221. The reversal of 10201211220 is 2211210201.

It is an interprime number because it is at equal distance from previous prime (10201211219) and next prime (10201211221).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 10201211196 and 10201211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10201211221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85010034 + ... + 85010153.

It is an arithmetic number, because the mean of its divisors is an integer number (1190141316).

Almost surely, 2^10201211220 is an apocalyptic number.

10201211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10201211220 is an abundant number, since it is smaller than the sum of its proper divisors (18362180364).

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

10201211220 is a wasteful number, since it uses less digits than its factorization.

10201211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170020199 (or 170020197 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10201211220 its reverse (2211210201), we get a palindrome (12412421421).

The spelling of 10201211220 in words is "ten billion, two hundred one million, two hundred eleven thousand, two hundred twenty".