1213220120322 has 64 divisors (see below), whose sum is σ = 2846498070528. Its totient is φ = 337490832000.

The previous prime is 1213220120311. The next prime is 1213220120341. The reversal of 1213220120322 is 2230210223121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128047 + ... + 1562957.

It is an arithmetic number, because the mean of its divisors is an integer number (44476532352).

Almost surely, 2^{1213220120322} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213220120322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1423249035264).

1213220120322 is an abundant number, since it is smaller than the sum of its proper divisors (1633277950206).

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

1213220120322 is a wasteful number, since it uses less digits than its factorization.

1213220120322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435455.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1213220120322 its reverse (2230210223121), we get a palindrome (3443430343443).

The spelling of 1213220120322 in words is "one trillion, two hundred thirteen billion, two hundred twenty million, one hundred twenty thousand, three hundred twenty-two".