1231120002 has 24 divisors (see below), whose sum is σ = 2864239056. Its totient is φ = 351748488.

The previous prime is 1231119983. The next prime is 1231120003. The reversal of 1231120002 is 2000211321.

It is a self number, because there is not a number n which added to its sum of digits gives 1231120002.

It is not an unprimeable number, because it can be changed into a prime (1231120003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2093448 + ... + 2094035.

It is an arithmetic number, because the mean of its divisors is an integer number (119343294).

Almost surely, 2^1231120002 is an apocalyptic number.

1231120002 is an abundant number, since it is smaller than the sum of its proper divisors (1633119054).

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

1231120002 is a wasteful number, since it uses less digits than its factorization.

1231120002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4187502 (or 4187495 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1231120002 is about 35087.3196753471. The cubic root of 1231120002 is about 1071.7663787195.

Adding to 1231120002 its reverse (2000211321), we get a palindrome (3231331323).

The spelling of 1231120002 in words is "one billion, two hundred thirty-one million, one hundred twenty thousand, two".