2111121222020 has 24 divisors (see below), whose sum is σ = 4434914078784. Its totient is φ = 844151438816.

The previous prime is 2111121222019. The next prime is 2111121222029. The reversal of 2111121222020 is 202221211112.

It is a self number, because there is not a number n which added to its sum of digits gives 2111121222020.

It is not an unprimeable number, because it can be changed into a prime (2111121222029) 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, 18507344 + ... + 18621063.

It is an arithmetic number, because the mean of its divisors is an integer number (184788086616).

Almost surely, 2^{2111121222020} is an apocalyptic number.

2111121222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111121222020 is an abundant number, since it is smaller than the sum of its proper divisors (2323792856764).

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

2111121222020 is a wasteful number, since it uses less digits than its factorization.

2111121222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37131259 (or 37131257 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2111121222020 its reverse (202221211112), we get a palindrome (2313342433132).

The spelling of 2111121222020 in words is "two trillion, one hundred eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty".