1240872821292 has 24 divisors (see below), whose sum is σ = 3118090679536. Its totient is φ = 381807021888.

The previous prime is 1240872821291. The next prime is 1240872821347. The reversal of 1240872821292 is 2921282780421.

It is not an unprimeable number, because it can be changed into a prime (1240872821291) 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, 3977156323 + ... + 3977156634.

Almost surely, 2^{1240872821292} is an apocalyptic number.

1240872821292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1240872821292 is an abundant number, since it is smaller than the sum of its proper divisors (1877217858244).

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

1240872821292 is a wasteful number, since it uses less digits than its factorization.

1240872821292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7954312977 (or 7954312975 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The spelling of 1240872821292 in words is "one trillion, two hundred forty billion, eight hundred seventy-two million, eight hundred twenty-one thousand, two hundred ninety-two".