1020212220 has 48 divisors (see below), whose sum is σ = 3006944640. Its totient is φ = 257737536.

The previous prime is 1020212213. The next prime is 1020212233. The reversal of 1020212220 is 222120201.

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

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1020212196 and 1020212205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446322 + ... + 448601.

It is an arithmetic number, because the mean of its divisors is an integer number (62644680).

Almost surely, 2^1020212220 is an apocalyptic number.

1020212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020212220 is an abundant number, since it is smaller than the sum of its proper divisors (1986732420).

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

1020212220 is a wasteful number, since it uses less digits than its factorization.

1020212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894954 (or 894952 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1020212220 is about 31940.7611055216. The cubic root of 1020212220 is about 1006.6925169646.

Adding to 1020212220 its reverse (222120201), we get a palindrome (1242332421).

It can be divided in two parts, 10202 and 12220, that added together give a palindrome (22422).

The spelling of 1020212220 in words is "one billion, twenty million, two hundred twelve thousand, two hundred twenty".