211221322021031 has 12 divisors (see below), whose sum is σ = 245850207969240. Its totient is φ = 180940910073840.

The previous prime is 211221322021027. The next prime is 211221322021037. The reversal of 211221322021031 is 130120223122112.

211221322021031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211221322021031 - 2² = 211221322021027 is a prime.

It is a super-2 number, since 2×211221322021031² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211221322020988 and 211221322021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221322021037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1261074605 + ... + 1261242086.

It is an arithmetic number, because the mean of its divisors is an integer number (20487517330770).

Almost surely, 2^{211221322021031} is an apocalyptic number.

211221322021031 is a deficient number, since it is larger than the sum of its proper divisors (34628885948209).

211221322021031 is a wasteful number, since it uses less digits than its factorization.

211221322021031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2522318414 (or 2522318407 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 211221322021031 its reverse (130120223122112), we get a palindrome (341341545143143).

The spelling of 211221322021031 in words is "two hundred eleven trillion, two hundred twenty-one billion, three hundred twenty-two million, twenty-one thousand, thirty-one".