2151212000 has 96 divisors (see below), whose sum is σ = 6040681920. Its totient is φ = 737548800.

The previous prime is 2151211999. The next prime is 2151212009. The reversal of 2151212000 is 2121512.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151212009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10415 + ... + 66414.

It is an arithmetic number, because the mean of its divisors is an integer number (62923770).

Almost surely, 2^2151212000 is an apocalyptic number.

2151212000 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 2151212000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3020340960).

2151212000 is an abundant number, since it is smaller than the sum of its proper divisors (3889469920).

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

2151212000 is an equidigital number, since it uses as much as digits as its factorization.

2151212000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76861 (or 76843 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 2151212000 is about 46381.1599682457. The cubic root of 2151212000 is about 1290.9053596761.

Adding to 2151212000 its reverse (2121512), we get a palindrome (2153333512).

The spelling of 2151212000 in words is "two billion, one hundred fifty-one million, two hundred twelve thousand".