21034151061 has 48 divisors (see below), whose sum is σ = 37137719808. Its totient is φ = 10451733600.

The previous prime is 21034151041. The next prime is 21034151087. The reversal of 21034151061 is 16015143012.

It is a happy number.

It is not a de Polignac number, because 21034151061 - 2⁶ = 21034150997 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034151041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 245595 + ... + 319976.

It is an arithmetic number, because the mean of its divisors is an integer number (773702496).

Almost surely, 2^21034151061 is an apocalyptic number.

21034151061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21034151061 is a deficient number, since it is larger than the sum of its proper divisors (16103568747).

21034151061 is a wasteful number, since it uses less digits than its factorization.

21034151061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565622 (or 565615 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 21034151061 its reverse (16015143012), we get a palindrome (37049294073).

The spelling of 21034151061 in words is "twenty-one billion, thirty-four million, one hundred fifty-one thousand, sixty-one".