1221022102240 has 48 divisors (see below), whose sum is σ = 2885680446768. Its totient is φ = 488236865536.

The previous prime is 1221022102229. The next prime is 1221022102241. The reversal of 1221022102240 is 422012201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221022102241) 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, 887257 + ... + 1797016.

It is an arithmetic number, because the mean of its divisors is an integer number (60118342641).

Almost surely, 2^{1221022102240} is an apocalyptic number.

1221022102240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221022102240 is an abundant number, since it is smaller than the sum of its proper divisors (1664658344528).

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

1221022102240 is a wasteful number, since it uses less digits than its factorization.

1221022102240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2687131 (or 2687123 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1221022102240 its reverse (422012201221), we get a palindrome (1643034303461).

The spelling of 1221022102240 in words is "one trillion, two hundred twenty-one billion, twenty-two million, one hundred two thousand, two hundred forty".