2151403421200 has 120 divisors (see below), whose sum is σ = 5643666791136. Its totient is φ = 781630080000.

The previous prime is 2151403421099. The next prime is 2151403421231. The reversal of 2151403421200 is 21243041512.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4723500 + ... + 5158900.

Almost surely, 2^{2151403421200} is an apocalyptic number.

2151403421200 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 2151403421200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2821833395568).

2151403421200 is an abundant number, since it is smaller than the sum of its proper divisors (3492263369936).

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

2151403421200 is a wasteful number, since it uses less digits than its factorization.

2151403421200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436553 (or 436542 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 2151403421200 its reverse (21243041512), we get a palindrome (2172646462712).

The spelling of 2151403421200 in words is "two trillion, one hundred fifty-one billion, four hundred three million, four hundred twenty-one thousand, two hundred".