2121023111020 has 36 divisors (see below), whose sum is σ = 4895882277552. Its totient is φ = 771281130400.

The previous prime is 2121023111003. The next prime is 2121023111027. The reversal of 2121023111020 is 201113201212.

It is a super-3 number, since 3×2121023111020³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121023110985 and 2121023111003.

It is not an unprimeable number, because it can be changed into a prime (2121023111027) 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, 438225496 + ... + 438230335.

It is an arithmetic number, because the mean of its divisors is an integer number (135996729932).

Almost surely, 2^{2121023111020} is an apocalyptic number.

2121023111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121023111020 is an abundant number, since it is smaller than the sum of its proper divisors (2774859166532).

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

2121023111020 is a wasteful number, since it uses less digits than its factorization.

2121023111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876455862 (or 876455849 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 2121023111020 its reverse (201113201212), we get a palindrome (2322136312232).

The spelling of 2121023111020 in words is "two trillion, one hundred twenty-one billion, twenty-three million, one hundred eleven thousand, twenty".