1221110202 has 32 divisors (see below), whose sum is σ = 2768512320. Its totient is φ = 355950720.

The previous prime is 1221110161. The next prime is 1221110237. The reversal of 1221110202 is 2020111221.

It is a super-2 number, since 2×1221110202² = 2982220250856961608, which contains 22 as substring.

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, 410499 + ... + 413462.

It is an arithmetic number, because the mean of its divisors is an integer number (86516010).

Almost surely, 2^1221110202 is an apocalyptic number.

1221110202 is an abundant number, since it is smaller than the sum of its proper divisors (1547402118).

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

1221110202 is a wasteful number, since it uses less digits than its factorization.

1221110202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823998.

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

The square root of 1221110202 is about 34944.3872746397. The cubic root of 1221110202 is about 1068.8537531503.

Adding to 1221110202 its reverse (2020111221), we get a palindrome (3241221423).

The spelling of 1221110202 in words is "one billion, two hundred twenty-one million, one hundred ten thousand, two hundred two".