21121141022445 has 16 divisors (see below), whose sum is σ = 33794095522752. Its totient is φ = 11264518583040.

The previous prime is 21121141022419. The next prime is 21121141022473. The reversal of 21121141022445 is 54422014112112.

It is a happy number.

It is not a de Polignac number, because 21121141022445 - 2¹² = 21121141018349 is a prime.

It is a super-2 number, since 2×21121141022445² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 3659707 + ... + 7458936.

It is an arithmetic number, because the mean of its divisors is an integer number (2112130970172).

Almost surely, 2^{21121141022445} is an apocalyptic number.

It is an amenable number.

21121141022445 is a deficient number, since it is larger than the sum of its proper divisors (12672954500307).

21121141022445 is a wasteful number, since it uses less digits than its factorization.

21121141022445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11245292.

The product of its (nonzero) digits is 5120, while the sum is 30.

Adding to 21121141022445 its reverse (54422014112112), we get a palindrome (75543155134557).

The spelling of 21121141022445 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred forty-one million, twenty-two thousand, four hundred forty-five".