2002154121434 has 16 divisors (see below), whose sum is σ = 3009090425472. Its totient is φ = 999125406048.

The previous prime is 2002154121377. The next prime is 2002154121437. The reversal of 2002154121434 is 4341214512002.

It is a happy number.

It is a super-2 number, since 2×2002154121434² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2002154121397 and 2002154121406.

It is not an unprimeable number, because it can be changed into a prime (2002154121437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2462822 + ... + 3173294.

It is an arithmetic number, because the mean of its divisors is an integer number (188068151592).

Almost surely, 2^{2002154121434} is an apocalyptic number.

2002154121434 is a deficient number, since it is larger than the sum of its proper divisors (1006936304038).

2002154121434 is a wasteful number, since it uses less digits than its factorization.

2002154121434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713221.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 2002154121434 its reverse (4341214512002), we get a palindrome (6343368633436).

The spelling of 2002154121434 in words is "two trillion, two billion, one hundred fifty-four million, one hundred twenty-one thousand, four hundred thirty-four".