21151211410 has 32 divisors (see below), whose sum is σ = 43563795840. Its totient is φ = 7243055232.

The previous prime is 21151211383. The next prime is 21151211437. The reversal of 21151211410 is 1411215112.

It is an interprime number because it is at equal distance from previous prime (21151211383) and next prime (21151211437).

It is a super-2 number, since 2×21151211410² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124795 + ... + 240574.

It is an arithmetic number, because the mean of its divisors is an integer number (1361368620).

Almost surely, 2^21151211410 is an apocalyptic number.

21151211410 is an abundant number, since it is smaller than the sum of its proper divisors (22412584430).

21151211410 is a wasteful number, since it uses less digits than its factorization.

21151211410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366210.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 21151211410 its reverse (1411215112), we get a palindrome (22562426522).

The spelling of 21151211410 in words is "twenty-one billion, one hundred fifty-one million, two hundred eleven thousand, four hundred ten".