20100201220 has 48 divisors (see below), whose sum is σ = 47118633408. Its totient is φ = 7139180160.

The previous prime is 20100201211. The next prime is 20100201229. The reversal of 20100201220 is 2210200102.

It is an interprime number because it is at equal distance from previous prime (20100201211) and next prime (20100201229).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20100201197 and 20100201206.

It is not an unprimeable number, because it can be changed into a prime (20100201229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1052919 + ... + 1071838.

It is an arithmetic number, because the mean of its divisors is an integer number (981638196).

Almost surely, 2^20100201220 is an apocalyptic number.

20100201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100201220 is an abundant number, since it is smaller than the sum of its proper divisors (27018432188).

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

20100201220 is a wasteful number, since it uses less digits than its factorization.

20100201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2124820 (or 2124818 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20100201220 its reverse (2210200102), we get a palindrome (22310401322).

The spelling of 20100201220 in words is "twenty billion, one hundred million, two hundred one thousand, two hundred twenty".