1212007220 has 24 divisors (see below), whose sum is σ = 2583206304. Its totient is φ = 477566496.

The previous prime is 1212007193. The next prime is 1212007243. The reversal of 1212007220 is 227002121.

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, 450902 + ... + 453581.

It is an arithmetic number, because the mean of its divisors is an integer number (107633596).

Almost surely, 2^1212007220 is an apocalyptic number.

1212007220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212007220 is an abundant number, since it is smaller than the sum of its proper divisors (1371199084).

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

1212007220 is a wasteful number, since it uses less digits than its factorization.

1212007220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904559 (or 904557 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1212007220 is about 34813.8940654446. The cubic root of 1212007220 is about 1066.1911393837.

Adding to 1212007220 its reverse (227002121), we get a palindrome (1439009341).

The spelling of 1212007220 in words is "one billion, two hundred twelve million, seven thousand, two hundred twenty".