1101221012 has 12 divisors (see below), whose sum is σ = 1932507360. Its totient is φ = 549076056.

The previous prime is 1101221003. The next prime is 1101221021. The reversal of 1101221012 is 2101221011.

It is an interprime number because it is at equal distance from previous prime (1101221003) and next prime (1101221021).

It is a junction number, because it is equal to n+sod(n) for n = 1101220984 and 1101221002.

It is a congruent number.

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, 381998 + ... + 384869.

It is an arithmetic number, because the mean of its divisors is an integer number (161042280).

Almost surely, 2^1101221012 is an apocalyptic number.

It is an amenable number.

1101221012 is a deficient number, since it is larger than the sum of its proper divisors (831286348).

1101221012 is a wasteful number, since it uses less digits than its factorization.

1101221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767230 (or 767228 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1101221012 is about 33184.6502467632. The cubic root of 1101221012 is about 1032.6619216180.

Adding to 1101221012 its reverse (2101221011), we get a palindrome (3202442023).

Subtracting 1101221012 from its reverse (2101221011), we obtain a palindrome (999999999).

The spelling of 1101221012 in words is "one billion, one hundred one million, two hundred twenty-one thousand, twelve".