1221012026 has 16 divisors (see below), whose sum is σ = 1973026944. Its totient is φ = 563366064.

The previous prime is 1221012007. The next prime is 1221012049. The reversal of 1221012026 is 6202101221.

It is a super-3 number, since 3×1221012026³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221011995 and 1221012013.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114035 + ... + 124281.

It is an arithmetic number, because the mean of its divisors is an integer number (123314184).

Almost surely, 2^1221012026 is an apocalyptic number.

1221012026 is a deficient number, since it is larger than the sum of its proper divisors (752014918).

1221012026 is a wasteful number, since it uses less digits than its factorization.

1221012026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14845.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1221012026 is about 34942.9825000672. The cubic root of 1221012026 is about 1068.8251074697.

Adding to 1221012026 its reverse (6202101221), we get a palindrome (7423113247).

The spelling of 1221012026 in words is "one billion, two hundred twenty-one million, twelve thousand, twenty-six".