1221011022102 has 16 divisors (see below), whose sum is σ = 2478470135232. Its totient is φ = 400928992200.

The previous prime is 1221011022047. The next prime is 1221011022157. The reversal of 1221011022102 is 2012201101221.

It is an interprime number because it is at equal distance from previous prime (1221011022047) and next prime (1221011022157).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1518670024 + ... + 1518670827.

It is an arithmetic number, because the mean of its divisors is an integer number (154904383452).

Almost surely, 2^{1221011022102} is an apocalyptic number.

1221011022102 is an abundant number, since it is smaller than the sum of its proper divisors (1257459113130).

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

1221011022102 is a wasteful number, since it uses less digits than its factorization.

1221011022102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037340923.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1221011022102 its reverse (2012201101221), we get a palindrome (3233212123323).

The spelling of 1221011022102 in words is "one trillion, two hundred twenty-one billion, eleven million, twenty-two thousand, one hundred two".