1221958164462 has 16 divisors (see below), whose sum is σ = 2793047233152. Its totient is φ = 349130904120.

The previous prime is 1221958164461. The next prime is 1221958164463. The reversal of 1221958164462 is 2644618591221.

It is an interprime number because it is at equal distance from previous prime (1221958164461) and next prime (1221958164463).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221958164461) 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, 14547120964 + ... + 14547121047.

It is an arithmetic number, because the mean of its divisors is an integer number (174565452072).

Almost surely, 2^{1221958164462} is an apocalyptic number.

1221958164462 is an abundant number, since it is smaller than the sum of its proper divisors (1571089068690).

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

1221958164462 is a wasteful number, since it uses less digits than its factorization.

1221958164462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29094242023.

The product of its digits is 1658880, while the sum is 51.

The spelling of 1221958164462 in words is "one trillion, two hundred twenty-one billion, nine hundred fifty-eight million, one hundred sixty-four thousand, four hundred sixty-two".