2121400202430 has 64 divisors (see below), whose sum is σ = 5315660702208. Its totient is φ = 540811666560.

The previous prime is 2121400202429. The next prime is 2121400202431. The reversal of 2121400202430 is 342020041212.

It is an interprime number because it is at equal distance from previous prime (2121400202429) and next prime (2121400202431).

It is a junction number, because it is equal to n+sod(n) for n = 2121400202397 and 2121400202406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121400202431) 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, 400752 + ... + 2098428.

It is an arithmetic number, because the mean of its divisors is an integer number (83057198472).

Almost surely, 2^{2121400202430} is an apocalyptic number.

2121400202430 is an abundant number, since it is smaller than the sum of its proper divisors (3194260499778).

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

2121400202430 is a wasteful number, since it uses less digits than its factorization.

2121400202430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699521.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 2121400202430 its reverse (342020041212), we get a palindrome (2463420243642).

The spelling of 2121400202430 in words is "two trillion, one hundred twenty-one billion, four hundred million, two hundred two thousand, four hundred thirty".