1023121311000 has 64 divisors (see below), whose sum is σ = 3192138499680. Its totient is φ = 272832348800.

The previous prime is 1023121310983. The next prime is 1023121311013. The reversal of 1023121311000 is 1131213201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170517219 + ... + 170523218.

Almost surely, 2^{1023121311000} is an apocalyptic number.

1023121311000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023121311000 is an abundant number, since it is smaller than the sum of its proper divisors (2169017188680).

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

1023121311000 is a wasteful number, since it uses less digits than its factorization.

1023121311000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341040461 (or 341040447 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1023121311000 its reverse (1131213201), we get a palindrome (1024252524201).

The spelling of 1023121311000 in words is "one trillion, twenty-three billion, one hundred twenty-one million, three hundred eleven thousand".