2123209031520 has 192 divisors, whose sum is σ = 6916501702656. Its totient is φ = 546921123840.

The previous prime is 2123209031501. The next prime is 2123209031533. The reversal of 2123209031520 is 251309023212.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8008932 + ... + 8269788.

It is an arithmetic number, because the mean of its divisors is an integer number (36023446368).

Almost surely, 2^{2123209031520} is an apocalyptic number.

2123209031520 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 2123209031520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3458250851328).

2123209031520 is an abundant number, since it is smaller than the sum of its proper divisors (4793292671136).

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

2123209031520 is a wasteful number, since it uses less digits than its factorization.

2123209031520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261453 (or 261445 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The spelling of 2123209031520 in words is "two trillion, one hundred twenty-three billion, two hundred nine million, thirty-one thousand, five hundred twenty".