1321211028942 has 48 divisors (see below), whose sum is σ = 3384382940640. Its totient is φ = 364472006976.

The previous prime is 1321211028931. The next prime is 1321211028953. The reversal of 1321211028942 is 2498201121231.

It is a happy number.

1321211028942 is a `hidden beast` number, since 1 + 321 + 2 + 1 + 10 + 289 + 42 = 666.

It is an interprime number because it is at equal distance from previous prime (1321211028931) and next prime (1321211028953).

It is a junction number, because it is equal to n+sod(n) for n = 1321211028897 and 1321211028906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180786033 + ... + 180793340.

It is an arithmetic number, because the mean of its divisors is an integer number (70507977930).

Almost surely, 2^{1321211028942} is an apocalyptic number.

1321211028942 is an abundant number, since it is smaller than the sum of its proper divisors (2063171911698).

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

1321211028942 is a wasteful number, since it uses less digits than its factorization.

1321211028942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361579417 (or 361579414 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 1321211028942 in words is "one trillion, three hundred twenty-one billion, two hundred eleven million, twenty-eight thousand, nine hundred forty-two".