1221022101202 has 16 divisors (see below), whose sum is σ = 1838267928792. Its totient is φ = 608266419840.

The previous prime is 1221022101181. The next prime is 1221022101203. The reversal of 1221022101202 is 2021012201221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 903680285641 + 317341815561 = 950621^2 + 563331^2 .

It is not an unprimeable number, because it can be changed into a prime (1221022101203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9309108 + ... + 9439360.

Almost surely, 2^{1221022101202} is an apocalyptic number.

1221022101202 is a deficient number, since it is larger than the sum of its proper divisors (617245827590).

1221022101202 is a wasteful number, since it uses less digits than its factorization.

1221022101202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147453.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1221022101202 its reverse (2021012201221), we get a palindrome (3242034302423).

The spelling of 1221022101202 in words is "one trillion, two hundred twenty-one billion, twenty-two million, one hundred one thousand, two hundred two".