1211021102213 has 16 divisors (see below), whose sum is σ = 1306358442816. Its totient is φ = 1115996883840.

The previous prime is 1211021102201. The next prime is 1211021102251. The reversal of 1211021102213 is 3122011201121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1211021102213 - 2⁴ = 1211021102197 is a prime.

It is a super-3 number, since 3×1211021102213³ (a number of 37 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 Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1211021102191 and 1211021102200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211021102113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21325145 + ... + 21381857.

It is an arithmetic number, because the mean of its divisors is an integer number (81647402676).

Almost surely, 2^{1211021102213} is an apocalyptic number.

1211021102213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1211021102213 is a deficient number, since it is larger than the sum of its proper divisors (95337340603).

1211021102213 is a wasteful number, since it uses less digits than its factorization.

1211021102213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59444.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1211021102213 its reverse (3122011201121), we get a palindrome (4333032303334).

The spelling of 1211021102213 in words is "one trillion, two hundred eleven billion, twenty-one million, one hundred two thousand, two hundred thirteen".