1211021104 has 20 divisors (see below), whose sum is σ = 2351071000. Its totient is φ = 604293120.

The previous prime is 1211021087. The next prime is 1211021111. The reversal of 1211021104 is 4011201121.

It is a super-2 number, since 2×1211021104² = 2933144228666757632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67857 + ... + 83824.

It is an arithmetic number, because the mean of its divisors is an integer number (117553550).

Almost surely, 2^1211021104 is an apocalyptic number.

It is an amenable number.

1211021104 is a deficient number, since it is larger than the sum of its proper divisors (1140049896).

1211021104 is a wasteful number, since it uses less digits than its factorization.

1211021104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152188 (or 152182 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1211021104 is about 34799.7285046881. The cubic root of 1211021104 is about 1065.9019019937.

Adding to 1211021104 its reverse (4011201121), we get a palindrome (5222222225).

The spelling of 1211021104 in words is "one billion, two hundred eleven million, twenty-one thousand, one hundred four".