1220121202 has 16 divisors (see below), whose sum is σ = 1838997432. Its totient is φ = 607129600.

The previous prime is 1220121169. The next prime is 1220121247. The reversal of 1220121202 is 2021210221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 663114001 + 557007201 = 25751^2 + 23601^2 .

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, 434202 + ... + 437002.

Almost surely, 2^1220121202 is an apocalyptic number.

1220121202 is a deficient number, since it is larger than the sum of its proper divisors (618876230).

1220121202 is a wasteful number, since it uses less digits than its factorization.

1220121202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3773.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1220121202 is about 34930.2333516397. The cubic root of 1220121202 is about 1068.5651136603.

Adding to 1220121202 its reverse (2021210221), we get a palindrome (3241331423).

The spelling of 1220121202 in words is "one billion, two hundred twenty million, one hundred twenty-one thousand, two hundred two".