3111121001020 has 48 divisors (see below), whose sum is σ = 6902780925600. Its totient is φ = 1174568359680.

The previous prime is 3111121000991. The next prime is 3111121001071. The reversal of 3111121001020 is 201001211113.

It is a happy number.

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, 15115551 + ... + 15319990.

It is an arithmetic number, because the mean of its divisors is an integer number (143807935950).

Almost surely, 2^{3111121001020} is an apocalyptic number.

It is an amenable number.

3111121001020 is an abundant number, since it is smaller than the sum of its proper divisors (3791659924580).

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

3111121001020 is a wasteful number, since it uses less digits than its factorization.

3111121001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30435838 (or 30435836 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 3111121001020 its reverse (201001211113), we get a palindrome (3312122212133).

The spelling of 3111121001020 in words is "three trillion, one hundred eleven billion, one hundred twenty-one million, one thousand, twenty".