21121311130292 has 6 divisors (see below), whose sum is σ = 36962294478018. Its totient is φ = 10560655565144.

The previous prime is 21121311130291. The next prime is 21121311130307. The reversal of 21121311130292 is 29203111312112.

It can be written as a sum of positive squares in only one way, i.e., 20111314270096 + 1009996860196 = 4484564^2 + 1004986^2 .

It is a super-2 number, since 2×21121311130292² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121311130291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2640163891283 + ... + 2640163891290.

It is an arithmetic number, because the mean of its divisors is an integer number (6160382413003).

Almost surely, 2^{21121311130292} is an apocalyptic number.

It is an amenable number.

21121311130292 is a deficient number, since it is larger than the sum of its proper divisors (15840983347726).

21121311130292 is a wasteful number, since it uses less digits than its factorization.

21121311130292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5280327782577 (or 5280327782575 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

It can be divided in two parts, 2112131 and 1130292, that added together give a palindrome (3242423).

The spelling of 21121311130292 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred eleven million, one hundred thirty thousand, two hundred ninety-two".