321129742290 has 48 divisors (see below), whose sum is σ = 896541815232. Its totient is φ = 73401083616.

The previous prime is 321129742259. The next prime is 321129742291. The reversal of 321129742290 is 92247921123.

It is a super-2 number, since 2×321129742290² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (321129742291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109226334 + ... + 109229273.

It is an arithmetic number, because the mean of its divisors is an integer number (18677954484).

Almost surely, 2^321129742290 is an apocalyptic number.

321129742290 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

321129742290 is an abundant number, since it is smaller than the sum of its proper divisors (575412072942).

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

321129742290 is a wasteful number, since it uses less digits than its factorization.

321129742290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218455631 (or 218455624 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 321129742290 in words is "three hundred twenty-one billion, one hundred twenty-nine million, seven hundred forty-two thousand, two hundred ninety".