1221215410244 has 48 divisors (see below), whose sum is σ = 2268660172800. Its totient is φ = 573576546816.

The previous prime is 1221215410243. The next prime is 1221215410249. The reversal of 1221215410244 is 4420145121221.

It is not an unprimeable number, because it can be changed into a prime (1221215410243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16690412 + ... + 16763420.

It is an arithmetic number, because the mean of its divisors is an integer number (47263753600).

Almost surely, 2^{1221215410244} is an apocalyptic number.

It is an amenable number.

1221215410244 is a deficient number, since it is larger than the sum of its proper divisors (1047444762556).

1221215410244 is a wasteful number, since it uses less digits than its factorization.

1221215410244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74892 (or 74890 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The spelling of 1221215410244 in words is "one trillion, two hundred twenty-one billion, two hundred fifteen million, four hundred ten thousand, two hundred forty-four".