11721021034 has 8 divisors (see below), whose sum is σ = 17597649888. Its totient is φ = 5855137740.

The previous prime is 11721021019. The next prime is 11721021049. The reversal of 11721021034 is 43012012711.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11721021019) and next prime (11721021049).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 11721020996 and 11721021014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2683662 + ... + 2688025.

It is an arithmetic number, because the mean of its divisors is an integer number (2199706236).

Almost surely, 2^11721021034 is an apocalyptic number.

11721021034 is a deficient number, since it is larger than the sum of its proper divisors (5876628854).

11721021034 is a wasteful number, since it uses less digits than its factorization.

11721021034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5372780.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 11721021034 its reverse (43012012711), we get a palindrome (54733033745).

The spelling of 11721021034 in words is "eleven billion, seven hundred twenty-one million, twenty-one thousand, thirty-four".