1221420102222 has 16 divisors (see below), whose sum is σ = 2571410741760. Its totient is φ = 385711611192.

The previous prime is 1221420102163. The next prime is 1221420102247. The reversal of 1221420102222 is 2222010241221.

It is a super-2 number, since 2×1221420102222² (a number of 25 digits) contains 22 as substring.

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, 5357105598 + ... + 5357105825.

It is an arithmetic number, because the mean of its divisors is an integer number (160713171360).

Almost surely, 2^{1221420102222} is an apocalyptic number.

1221420102222 is an abundant number, since it is smaller than the sum of its proper divisors (1349990639538).

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

1221420102222 is a wasteful number, since it uses less digits than its factorization.

1221420102222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10714211447.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 1221420102222 its reverse (2222010241221), we get a palindrome (3443430343443).

The spelling of 1221420102222 in words is "one trillion, two hundred twenty-one billion, four hundred twenty million, one hundred two thousand, two hundred twenty-two".