21122077418437 has 8 divisors (see below), whose sum is σ = 22679546260032. Its totient is φ = 19599607876800.

The previous prime is 21122077418389. The next prime is 21122077418467. The reversal of 21122077418437 is 73481477022112.

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

It is not a de Polignac number, because 21122077418437 - 2²³ = 21122069029829 is a prime.

It is a super-3 number, since 3×21122077418437³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122077418467) 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, 8749823739 + ... + 8749826152.

It is an arithmetic number, because the mean of its divisors is an integer number (2834943282504).

Almost surely, 2^{21122077418437} is an apocalyptic number.

It is an amenable number.

21122077418437 is a deficient number, since it is larger than the sum of its proper divisors (1557468841595).

21122077418437 is a wasteful number, since it uses less digits than its factorization.

21122077418437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17499649979.

The product of its (nonzero) digits is 1053696, while the sum is 49.

The spelling of 21122077418437 in words is "twenty-one trillion, one hundred twenty-two billion, seventy-seven million, four hundred eighteen thousand, four hundred thirty-seven".