2111002121020 has 96 divisors (see below), whose sum is σ = 4798064194560. Its totient is φ = 775541329920.

The previous prime is 2111002121009. The next prime is 2111002121021. The reversal of 2111002121020 is 201212001112.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111002121021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89101336 + ... + 89125024.

It is an arithmetic number, because the mean of its divisors is an integer number (49979835360).

Almost surely, 2^{2111002121020} is an apocalyptic number.

2111002121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2111002121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2399032097280).

2111002121020 is an abundant number, since it is smaller than the sum of its proper divisors (2687062073540).

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

2111002121020 is a wasteful number, since it uses less digits than its factorization.

2111002121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25415 (or 25413 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2111002121020 its reverse (201212001112), we get a palindrome (2312214122132).

The spelling of 2111002121020 in words is "two trillion, one hundred eleven billion, two million, one hundred twenty-one thousand, twenty".